It was definitely interesting to see the differences, but having heard for years that this was the superior version I must admit I'm a bit disappointed in this game.
It's been ages since I've played it, but I remember the 360 version having a lot of good ideas and gameplay - being different to Chaos Theory, my favourite, didn't ruin it for me at all - and I was actually invested in the story and characters. In this, the story just seems like a rushed afterthought slapped onto some mediocre level design.
I don't like being so negative, and like I said it's been a long time, so maybe it's nostalgia talking, so I'm eager to see if the 360 version holds up and what you think of it.