Merlot and Cabernet Sauvignon: What Are the Differences?

Merlot or Cabernet Sauvignon? While these two grape varieties are staples in Bordeaux, they produce very different wines. One is generally associated with round, fruity, and supple wines, while the other offers more structure, power, and aging potential. However, their differences go beyond a few tasting notes: terroir, climate, grape ripeness, and blending also play a role in the wine’s final profile.

So, how can you tell a Merlot from a Cabernet Sauvignon? What are their main differences in the vineyard and in the glass? And why are they so often blended in Bordeaux?

In this article, we’ll explain in simple terms what sets these two major red grape varieties apart—from their characteristics to their tasting notes, and the regions where they thrive best.

What is Merlot?

Widely grown in Bordeaux, particularly on the right bank, Merlot is one of the region’s most iconic red grape varieties. It is found notably in the wines of Saint-Émilion and Pomerol, where it can make up the majority of the blends.

Merlot is generally appreciated for its fruity character and full-bodied texture. When young, it often develops aromas of plum, black cherry, blackberry, and ripe red berries. As the wine ages, more complex notes may emerge.

On the palate, it is generally characterized by:

• a round, fleshy texture;

• relatively soft tannins;

• a beautiful expression of the fruit;

• a rich, indulgent taste, especially when enjoyed young.

Merlot can therefore produce wines that are easy to drink when young, but it should not be dismissed as merely producing light wines. On great terroirs and under ideal ripening conditions, it can produce powerful, concentrated wines capable of aging for several years.

What is Cabernet Sauvignon?

Cabernet Sauvignon plays a major role in the great wines of Bordeaux, particularly on the Left Bank, in the Médoc and the Graves.

It generally produces wines with more structure than Merlot, with pronounced tannins and good aging potential. Its primary aromas are often associated with blackcurrant, dark fruits, and—depending on ripeness and terroir—vegetal or spicy notes.

On the palate, Cabernet Sauvignon is generally characterized by:

• more pronounced tannins;

• a major organization;

• a distinct freshness;

• aromas of dark fruits;

• a strong ability to adapt over time.

As it ages, the flavor profile can become more complex, developing notes of cedar, tobacco, leather, or spices.

Cabernet Sauvignon also needs ideal ripening conditions to reach its full potential. In cooler regions or vintages, it may exhibit more freshness and herbal notes. When it reaches optimal ripeness, it produces fuller-bodied, fruitier, and more balanced wines.

Merlot and Cabernet Sauvignon: What Are the Differences in the Vineyard?

The differences between the two grape varieties begin even before tasting. Merlot and Cabernet Sauvignon do not have exactly the same characteristics in the vineyard and do not respond in the same way to climate and terroir.

Merlot generally ripens earlier than Cabernet Sauvignon. It can therefore be particularly well-suited to regions where conditions allow the grapes to ripen more quickly.

Cabernet Sauvignon, on the other hand, needs more time to reach optimal maturity. It thrives particularly well in well-drained soils and areas with ample heat and sunlight.

This difference in ripening explains, in part, how they complement each other in Bordeaux blends: depending on the conditions of the vintage and the terroirs, the two grape varieties can contribute different characteristics to the final wine.

What is the difference in taste between Merlot and Cabernet Sauvignon?

It is usually during a tasting that the difference between the two grape varieties is easiest to detect.

Merlot is often rounder and fruitier, while Cabernet Sauvignon is generally more structured and tannic.

These differences, however, serve as general guidelines. A Merlot from a specific terroir can be very structured, while a Cabernet Sauvignon vinified in a more supple style can be particularly approachable when young.

The terroir, the vintage, the climate, winemaking decisions, and aging have a significant influence on the final product.

Why are Merlot and Cabernet Sauvignon blended in Bordeaux?

In Bordeaux, red wines are traditionally made from a blend of several grape varieties. Merlot and Cabernet Sauvignon complement each other to create a balanced and complex wine.

Merlot generally adds fruit, roundness, and a softer texture. Cabernet Sauvignon contributes more to the structure, freshness, and tannins, as well as to the wine's aging potential.

Their proportions vary depending on the estate, appellation, and vintage.

On the right bank, particularly in Saint-Émilion and Pomerol, Merlot often plays a significant role in blends. On the left bank, particularly in the Médoc, Cabernet Sauvignon generally plays a major role.

Other grape varieties may also be included in Bordeaux blends, such as Cabernet Franc or Petit Verdot.

The goal, therefore, is not to determine which grape variety is “better,” but to find the right balance among the wine’s various components.

Merlot or Cabernet Sauvignon: Which One Should You Choose?

The choice depends first and foremost on the style of wine you like.

If you're looking for a fruity, round, and full-bodied red wine, Merlot may be a good choice. It can be particularly enjoyable when young, especially when produced using winemaking techniques that emphasize fruit.

If you prefer wines that are more structured, tannic, and crisp, Cabernet Sauvignon is often a better choice. It can also be a good option if you're looking for a wine that will age well over time.

But be careful not to oversimplify: the grape variety alone is not enough to determine a wine’s style. A Merlot-dominant Bordeaux can be powerful and built for aging, while a Cabernet Sauvignon can produce an elegant and approachable wine, depending on the terroir and the winemaker’s craftsmanship.

What dishes go well with a Merlot or a Cabernet Sauvignon?

The differences in structure between the two grape varieties can also influence food-and-wine pairings.

With a Merlot

A smooth, fruity Merlot pairs well with:

• roast chicken;

• filet mignon;

• veal;

• mushrooms;

• roasted or grilled vegetables;

• hard cheeses.

A more full-bodied and concentrated Merlot pairs well with heartier dishes, such as duck breast or a slow-cooked meat dish.

With a Cabernet Sauvignon

Thanks to its body and tannins, Cabernet Sauvignon pairs particularly well with protein-rich, flavorful dishes:

• a grilled ribeye steak;

• a leg of lamb;

• beef in sauce;

• game;

• stews;

• certain aged cheeses.

In any case, the intensity of the dish should ideally match that of the wine. For example, a very full-bodied Cabernet Sauvignon may overpower a delicate dish, while a smooth Merlot may be better suited to a less robust dish.

At what temperature should you serve a Merlot or a Cabernet Sauvignon?

The serving temperature depends more on the style of the wine than on the grape variety itself.

For a smooth, fruity red wine, a temperature of around 14 to 15 °C generally helps preserve its freshness and fruitiness.

For a more full-bodied wine meant to be enjoyed with a hearty meal, aim for a temperature of 16 to 18 °C.

Above all, avoid serving red wines too warm: excessive heat can accentuate the sensation of alcohol and make the wine feel heavy on the palate.

Merlot or Cabernet Sauvignon: What Should You Keep in Mind?

Merlot and Cabernet Sauvignon are two complementary grape varieties that play a key role in Bordeaux red wines.

Merlot is generally associated with fruitiness, roundness, and softer tannins. Cabernet Sauvignon offers more structure, freshness, and tannins, often with significant aging potential.

But these characteristics are not set in stone. The terroir, climate, vintage, winemaking, and aging can significantly alter the expression of each grape variety.

That is also why the two are often blended: each contributes its own qualities to create a more balanced and complex wine.

FAQ

Is Merlot lighter than Cabernet Sauvignon?

Not necessarily. Merlot is often softer and rounder on the palate, but it can also produce powerful, concentrated wines capable of aging for a long time.

Is Cabernet Sauvignon always more tannic than Merlot?

Generally speaking, yes, Cabernet Sauvignon tends to have a more pronounced tannic structure. But the level of tannins also depends on the terroir, the ripeness of the grapes, and the winemaking choices.

Which one lasts the longest?

Both can produce wines suitable for aging. Cabernet Sauvignon is often particularly well-suited to aging thanks to its structure and acidity, but some great Merlots can also age for many years.

Can you drink a young Cabernet Sauvignon?

Yes. A Cabernet Sauvignon can be enjoyed young, especially when it’s made in an approachable style. However, the more structured wines can develop greater balance and complexity after a few years of aging.

Are Merlot and Cabernet Sauvignon used only in Bordeaux?

No. These two grape varieties are now grown in many wine-producing regions around the world. They are found, in particular, in France, Italy, Spain, the United States, Chile, Argentina, Australia, and South Africa. Their characteristics vary greatly depending on the climate and terroir.