For Dante's Inferno, I didn't like it. It was just a button masher; you can pretty much kill every enemy by spamming the O button. The controls, art-style, gameplay, pretty much everything is similar to GOW. The combat felt stiff, and using R2 to grab enemies was kind of weird. I did like the comic, animated cutscenes.

As for Bayonetta, the demo was awesome. The framerate & screen tearing issues are practically non-existant in the US version. The JP version was kind of bad, performance wise. Bayonetta is fast, deep and fun. I love the over-the-top action, and the amount of combos & weapons this game offers. The boss fight at the end was pretty cool.

dante inferno by far.

I liked Dante's Inferno much more (maybe because I prefer GOW to DMC) but I simply hate games where I do a whole bunch of cool moves but don't really get to see them because of camera, art style and flashy graphics, I'm looking at you Heavenly sword.
That said I found both stories were difficult to follow ( I know it's just a demo but story is really important to me, another reason why I prefer GOW to DMC) and Dante looks like it going to overdo it with the disgusting.

I have yet to play the GOW demo

^ Yup, definitely going to over do it with the disgusting.

I agree with the story. If they don't polish it, Dante's especially is going to be terrible.

I want to play the GoW demo. They need to put it up for everyone!