AWhat's the difference between wedding cake batter and regular cake batter or does it really matter?

AI'm not sure what you mean? Are you asking about a white cake recipe vs a yellow cake?

AYou can use any type of cake recipe to make a wedding cake.

My white cake recipe is the exact same whether I'm making a wedding cake or a party cake.

Now the only difference I can think of is the serving count, for example typical industry standards cut a wedding slice 1x2x4 and party slices can be larger like 2x2x4. Is that what you mean?

I haven't heard of there being a difference between wedding cake and regular cake, you can use any type of cake.

Yes there is a difference between white and yellow cake, but you can use any type of cake for wedding cake.

AOk thanks. I wasn't sure if I could stack a cake with any type of batter.

AYes, as long as you have an internal support structure.

The only time I would recommend a specific type of cake is if you were doing something with extensive carving, then you'd just want a more dense cake, like a butter cake or mudcake.

AAs others have said from time to time, one could stack over whipped cream or Jello when the right/proper support system is used. It matter not what type of cake is used.