Some cheeses are made with whole milk, and some are made from partially skimmed milk. Cheeses that are made with whole milk have a creamier more buttery texture. Cheeses that are made from partly skimmed milk have a firmer more plastic texture.

For reference, cheeses made from whole milk, like cheddar, are close to 50% milkfat. These would be called single creams. Cheeses like Brie are often produced with mild that has additional cream added and contain 60% milkfat.

These are double creams.
Single cream cheeses=50% or more milkfat
Double cream cheeses=60% or more milkfat
Triple cream cheese=70% or more milkfat
Being a triple cream, Mascarpone has a very rich, creamy buttery flavor, and a luxurious texture.