- Motto: "May God have mercy on my enemies, because I sure as hell won't."
Well, Voldemort accomplished most of what Palpatine did, albeit on a smaller scale. (Voldemort only had the UK to work with, he probably would have spread further if he didn't die)
Voldemort was killed by a kid...well, a 17 year old anyway, who was using a literally unstoppable weapon.
But Palpatine was killed by a man who only had one functioning arm (Prosthetic), a respirator (Which was malfunctioning), and would die if he took his mask off.
Anyway, let's look at actual powers:
Palpatine has above-average Force Powers (He's been shown to be about equal with Yoda), and can leap a large distance for a man of his age, and has enough skill with a lightsaber to be able to drop three Jedi Masters, then hold off Mace Windu for some time.
Voldemort has instant teleportation, flight, and a large number of skills at his disposal. It's been shown that the Killing Curse can be cast in just over a second, while most other spells don't even require an incantation. (Powerful wizards have been shown to be able to cast most low- and mid-level spells this way) While the Killing Curse is blockable, it usually requires a willing human sacrifice.
Yeah, Palpatine has an advantage with his lightsaber (Whatever happened to that after Episode III? He could have used that to NOT be thrown in a pit of death) and Force Powers, Voldemort has plenty of defensive spells, as well as spells comparable to most of Palpatine's Powers. (Accio/Force Pull, Crucio/Force Lightening, etc.)
As much of a Star Wars fan I am, I have to give this one to Voldemort. Call it an upset pick.