is there a BIG texture difference between donut holes and cake balls?
Yes. Completely different.
to me, and this is just me someone else jump in with their opinions, cake ball mix has the texture of peanut butter. not in a bad way, its just really smooth. whereas a donut hole is cooked after being formed into the hole shape and is a cake texture. not sure if i made that clear, but it sounded good in my head. lol