If you really want to see what a fantasy game feels like when all "magic" effects are the same, try playing Fantasy HERO.
You just use your points to build your spells. Nothing is divine or arcane or psionic, unless the GM decides that it has to be so for his campaign.
It looks just like super-powers.
While I love HERO as a game system, I find that I don't like the resultant flavor the system creates for a fantasy campaign- its bland. Instead of there being a default dichotomy of Good and Evil, Arcane (the work of Man) vs Divine (the power of gods), the GM has to work overtime to generate the proper feel of a fantasy campaign.