I'm going to agree with leo. Multi-plat comparisons are really the only truly necessary comparisons. People with both consoles should know which version is superior so they can tell which version will give them the best value for their buck. I also feel it should affect review scores if one is inferior.
Having said that, I will be further disappointed in IGN if they don't at least degrade the 360's score a few tenths of a point. If they did it with Bayonetta, then they need to do it with this game as well. Granted I don't think it warrants the whole 1.3 points they took off for Bayonetta, but it should be around a .5 difference.
Also, I find it funny that the same people who say it's ridiculous to compare multi-plats, are the same who compare the crap out of exclusives. Kinda hypocritical IMO.