The PS2 and Xbox base controllers are ass.
I have the Xbox version and use a magicbox converter + Sega Saturn pad.
We did a side by side comparison of the DC and Xbox versions … Major, major differences. For one, the characters are noticably smaller (Dudley was shorter, and Hugo was “thinner” or “less wide”) on the DC. The character protraits were smaller on DC, the color was washed out when compared to Xbox, the sound sucked when compared to Xbox.
I was surprised myself, cause I am a DC fanboy of the highest order. But its all true.
As for the PS2 vs. Xbox. Both are nearly identical from what I could tell. I thought that the characters looked a tad smaller on PS2, but I’m not sure, I’d have to do a side by side comparison like we did w/ the DC version.
Both control the same, it’s just that the shoulder buttons are reversed on the Xbox version (you can fix this in the options btw).
Strangely enough, the default on Xbox lines the buttons up perfectly for the Saturn controller. Which is nice.
Overall if you want online play (which is really surprisingly smooth) go with the Xbox. Otherwise, just get one or the other it don’t matter.