Either which way it's written or said, this is one of my favorite Latin phrases! Not that I know a ton (of Latin phrases, that is).
I learned the phrase from a stern literature professor at the University of Utah, Dr. Clarke. Basically it means "there is no disputing tastes!"
If you like Chocolate and I prefer Caramel, we can argue until the cows come home but our preferences won't change!
So, when it comes to opinions based on preference, there is little point in arguing my case. But, for the record, I do prefer caramel, especially Scotch Kisses from See’s Candies!