I prefer Duncan Hines
The all taste good, I really think that Duncan Hines is a better cake it is firmer, yet very moist. I always bake my cakes in a water bath, like you would a cheesecake. The cake does not dome as much and the sides and bottom stay a lighter color.
You don't get a crust on it that way. I use parchment paper on the bottom and rarely have to level my cakes, If I do very little.
Good Luck and Happy Baking