reincarnation deals with spirits. just as the flying spaghetti monster, it cannot be proven or disproven. i can't claim to believe nor disbelieve in reincarnation.
isn't evolution the same 
we can see genetic variation and adaptation in organisms with very quick life cycles, as we observe them over several generations under specifically controlled circumstances.
that's one actual, tangible evidence among countless others.
reincarnation is something that can never be proven.
evolution is something that can.
