http://www.eurogamer.net/article.php?article_id=56223
Eurogamer: How big do you think the game will be in comparison to the original?
Yannis Mallot: In terms of original gameplay, meaning the first time the player takes that challenge, we expect the game to be as long as The Sands Of Time. That doesn't take into consideration all the revisits the Prince have going back and forth in time. For example, because we create new level design challenge and new gameplay, we can definitely add a good three to four hours [compared] to the original Sands Of Time gameplay.
Eurogamer: Technically, are you doing anything new? Is it the same game engine before? Have you improved it much?
Yannis Mallot: That's the same Jade engine. We had a meeting with the Sony people themselves and they said, "You know what? The PS2 capabilities are here and your game is here" [motions hands to the same level], so we thought there's no way we can improve that. But the first thing we did on the PoP2 project was to put a five or six man engineer team together to try and look at the engine and see if, indeed, it could not be improved. And as a matter of fact, those guys came back and optimised the engine by 25 per cent. So this is 25 per cent more space for rooms, more texture, bigger maps, new special effect, and this is really really impressive when you see the size of the maps and all the new stuff.
Eurogamer: Are you making much more use of the Xbox than before?
Yannis Mallot: Yes, of course... The Xbox is much more impressive in terms of visuals, with things like heat effect and normal mapping and proper dynamic lighting.