Who would win?

[Shrouded Wolf]

Stephen Hawking with a few modifications to his chair or Albert Einstein?

[WalkerBoh]

Define "a few modifications". I could pretty easily add a flamethrower, or a compressed air tank and some nerve gas. Both are pretty much "I win" buttons against Einstein, who was not known for his badassitude in fighting while on fire or for holding his breath.

[Araxiel]

Does Einstein have prep time or foreknowledge of what mods Hawking has on his chair?

[WalkerBoh]

I did some research into this, and it actually already happened. Einstein won, because while Hawking started the fight using those modifications to spam surprise attacks to gain a win, from Einstein's relative frame of reference Hawking was just revealing all of his tricks. When Einstein finished observing from that frame of reference, and moved into Hawking's (i.e., the fight), Hawking was already tired and out of tricks.

Of course, then Hawking just glossed over it in his Brief History of Everything, claiming the outcome was unimportant and that the truly important parts were the jump jets and rocket punch he had installed.

[Araxiel]

I did some research into this, and it actually already happened. Einstein won, because while Hawking started the fight using those modifications to spam surprise attacks to gain a win, from Einstein's relative frame of reference Hawking was just revealing all of his tricks. When Einstein finished observing from that frame of reference, and moved into Hawking's (i.e., the fight), Hawking was already tired and out of tricks.

Of course, then Hawking just glossed over it in his Brief History of Everything, claiming the outcome was unimportant and that the truly important parts were the jump jets and rocket punch he had installed.

[TSEDTIKS]

the truly important parts were the jump jets and rocket punch he had installed.

Honestly, you can't argue with rocket punches. Awesome.