They're both good, just a different story. I recommend you play Sands of Time first, cuz ya know, Warrior Within is the sequel. I think you can get Sands of Time for like $20, but Warrior Within is expensive cuz it's new. Both are awesome games though.
I have Sands or Time, getting Warrior Within for Christmas, but I can't beat it cause theres some damn glitch that whenever a cutscene happens and it goes back to gameplay....my guy wont move <_< I gotta get a new one and no it isnt scratched nor dirty...dunno whats wrong with it but its an awesome game.
Why is it better though? I love Sands of Time and Warrior Within (Although Ive only got the demo for WW)
TSoT and WW are two completely different games, one is bazed more on puzzle solving while the other is based on combat system/dark side, lol. I liked both, but I though TSoT was better.
never played sands of time but getting ww cuz everyone says prince of persia is good and i've played the first DOS pop