Silent_Buddha
Legend
Xbox, in the first year, had a bunch of games with extra content or exclusive features. Not exclusive titles, but features or levels that were exclusive to Xbox. I don't remember every title, but I do remember Spider-man was a big one. The movie tie in game based on the Raimi movie. It had a Kraven the Hunter level that only appeared on Xbox. I think Tony Hawk had some exclusive levels or characters also. And there were definitely more.
And again, I get that adding more memory helps Xbox achieve more, but really, it's cost at the time and considering what it's contemporary competition had, memory was hardly Xbox's weakest point. In fact, it was one of it's strengths.
I'm not sure if you meant "...in addition to exclusive titles...", but there were certainly quite a few Xbox exclusive titles at launch. This was a time when a Japanese developer (Team Ninja) was developing almost exclusively for Xbox. Itagaki was a huge fan of the Xbox and X360.
Anyway, yeah, the Xbox versions of a lot of multiplatform games often featured Xbox specific content. Soul Calibur II as another example had Spawn in the Xbox version.
Regards,
SB