Yellow cake always tastes better than white cake does because the yellow cake has a much richer taste to it because of the ingredients.
Yellow cake is much richer and more flavorful because yellow cake uses butter for the fat and also whole eggs which then causes the finished cake to taste much richer and much better.
The combination of the butter and whole eggs in the ingredients is what makes the cake yellow in color.
It's because of the butter and eggs that makes the cake yellow and makes the yellow cake taste better than white cake.
Still white cake is pretty good as well as long as it's made properly but yellow cake has a much better taste to it.