Well you wanna bring stuff from the books into this then Saruman was banished from physical form by being stabbed with a dagger from Wormtongue.
It took a decent amount of time to use the avalanche, and he is far too close to use it on Voldemort, who can teleport anyway, when Voldemort just needs to use Avada Kedavra to win.
If both characters were in their mortal forms, nor horucruxes and no intangible forms, then Volds wins this absurdly fast.
If they both are their most common self, Voldy still wins no problem. In the LotRs universe, it takes much longer to cast a spell...so...that's why this isn't fair. If we gave Voldy the same rules....since they are in his universe, it takes much longer to manipulate the magics in that universe and much longer to cast spells.
I'm quite sure Moving Saruman to the HP-verse would net us some uber powerful wizards. It would be like moving Goku from 100x gravity to Planet Namek against the Ginyu force. It would feel like lifting tons of weight off of their shoulders...shoulders that were used to the extreme difficulty and mastery it takes to use magic in he LotRs verse.
But in either case, it would take each wizard quite some time to learn/get used to the magic of each universe, and how to manipulate it in that verse. However, Voldy still stomps as he can easily leech that info right out of someone's mind.
All the ways you wish you could be, that's me. I look like you wanna look, I **** like you wanna ****, I am smart, capable, and most importantly, I am free in all the ways that you are not.
You're wrong. Magic people in each verse are magic because they can use the "magical energies" from each verse. It is very much like the force...you are either sensitive to it, or you're not...despite the fact that it's still there. Muggle vs. wizard.
Yeah, but they'd most likely need an intermediate program like Wine to run their particular magic in another "verse", just saying. Even then, there could be unexpected compatibility issues and system freezes and/or crashes.
Think Orco, from He-Man. Grand wizards in one realm, bumbling retard in the another.
Ugh, have to side with DDM on this one, more often than not, when dealing with magic and magic users in film, there's mention of 'drawing upon mystic energies', implying that the magic energy/force is there, one only need the know how or have the ability to use it to their will.