XBOX v PS2 (Specificall Pirates or Harry Potter)

I posted this in System Wars as well, but didn't get very many replies...

Everyone's still on about XbOX360 v PS3 I'm sure. My question relates back to the days of XBOX v PS2, however.

My girlfriend isn't a big gamer, but she loves Pirates of the Caribbean and Harry Potter, so I was going to buy some games that she'd enjoy too. Most of the games from these series are on original XBOX or PS2. (360 supports all of them and I have a PS2)

SO! I was wondering if anyone had any advice console-to-console, hopefully focused on any of these games. General advice would be nice. I've heard fanboy rumours, I'd just like some help deciding which platform I should buy these games on.

Cheers!