Since Dante's Inferno was announced by EA, it has always been compared to God of War and often been called a God of War Clone. Well it's true, it is a God of War clone, although that's not neccessarily a bad thing.
I played Dante's Inferno first during the event, so that I could try and be as unbiased as possible. The demo was fairly short, but from what I played, the gameplay was fun, although a little easier than God Of War 3. I immediately thought the graphics were good and the combat was very fluid, even though it was obvious that the code was incomplete in some areas. Although the game was only playable on PS3 at the event, in some areas the a big "RB" button would be available to allow you to save the game, although at least it was mapped correctly to the R1 button.
The demo was a simple run through a level, some wall-climbing and scaling, and a fight against a centaur-type boss. Now here's why people call this a God of War clone, the controls and gameplay are almost exactly the same. The only difference is that Dante has a scythe, whereas Kratos has two blades. The square button on both games lets you do light attacks, and the triangle button does heavy attacks. The circle button on Dante's Inferno allows you to do some magic as well, which seems like an influence from Ninja Gaiden to be honest.
I then went to look for God Of War, and eventually found it after 5 minutes of wandering around, and then finding out it was in a completely different hall across the courtyard. Luckily, because of this, nobody was there, so I managed to play a full demo of the game. The demo was the same one we've all seen, with the lion-serpent-chimera thing, the ripping off of Helios' head (which is even more gruesome in person), and where Kratos rips out the cyclop's eye.
The first thing I noticed was that graphically, this was much better looking than Dante's Inferno, everything was just that little bit sharper and there weren't as many aliasing issues. The 3D models of enemies and Kratos also looked more detailed compared to Dante's Inferno. The newest thing about God of War 3 is that you now have the option to use the Cestus, aka lion head gloves, and the ability to grab an enemy and run into others whilst holding him. The new additions are good, and definitely help the gameplay.
Overall, this definitely feels like and plays like a God of War game, and from what I played, it definitely is superior to Dante's Inferno in many ways. However, be sure to look out for both games, because both of them will be a lot of fun.