Both are red but they are two different grapes. Merlot have been a blending grape into Cabernet for years to soften and round out the wine. Cabernet is the king of the reds and is the most full bodied of all red wines.
merlot is made with red grapes and cabernet is made with blue grapes
Cabernet Sauvignon.
Merlot is a cousin of Cabernet Sauvignon.
They are different cultivars of grape. Cabernet Sauvignon is a hybrid formed centuries ago in Bordeaux by the cross pollination of Sauvignon Blanc and Cabernet Franc. Zinfandel is a misnomer of the variety Primitivo/Kriejenak Castlanski from Croatia. Think of the difference between a border collie and a Labrador. Both are dogs but are bred in different places to enhance different characteristics.
Cabernet Sauvignon
Because that's what it's most suited for.
Bordeaux cepage is cabernet sauvignon, cabernet franc and merlot
Very little difference.
merlot is made with red grapes and cabernet is made with blue grapes
Some common French wines are Merlot, Sauvignon Blanc or Grenache! :-)
A merlot or cabernet sauvignon would be nice. (Both are red wines)
White - chardonnay, viognier, sauvignon blanc Red - cabernet sauvignon, pinot noir, merlot