32 bit dolphin vs 64 bit

[killerchao999]

Hi, I currently have a 32 bit windows vista system, with 32 bit dolphin on it. Games run alright in 32 bit, but not perfect. I have a friend who informed me that 64 bit dolphin is waaaay better at emulating gamecube, as gamecube is a 64 bit system. But the FAQ states that the only difference between the two is that 64 is slightly faster. I could install 64 bit ubuntu, but that would require me to risk my primary boot partition by resizing it. How much better is 64 bit? Is it worth installing ubuntu?