I like both, and if I could, I'd get an Xbox.
This kind of debate is kindda old :/
It was ok back in the nineties, when you could find the same kind of games on consoles and on computers ( Gods, the Blues Brothers, Prehistoric versus Mario, Zelda, etc, or mortal kombat, OMF versus the capcom or SNK games. Or even, why not, a little Xenon2 vs Project X )
But now, what's the point? you have a handful of games that can be compared ( a few FPS, and even fewer RTS ). and that's all

what to compare? If I want to play, say, Dead or Alive, I'll be very happy with my ubber PC with its radeon 92 K alpha prime, that's for sure

But I sure hate playing that Turok2 game on my friends PS2, coz I can't do crap with a paddle ( having my ass whipped on a FPS, I feel kindda ****ty, give me back my keyboard

).
So yeah, I like both the same.