He really meant was the originality came from the very concept of the system which is very similar to yours. They do have different codes but yet I don't see anything in features. But for efficient use, of course, one person will choose one of your systems as self preference by their liking.
Tested it. And it seems that it isn't MUI because it bugs. Try casting it at the same time. Or try this
Spellcaster#1 - casts to -> Ogre
Specaster#2 - casts to -> Spellcaster#1
You will see funny stuff.
Wow! I like it. Simple but useful. Great job!
Don't mind what others say. Just continue on making spells as well as fixing them.
Fixing them while learning is also fun. It not just improve your spells but you will also help you in your future projects and such.