Asphalt 3D has gotten tons of bad reviews from critics (in fact the series has always gotten crap from reviewers), but I personally enjoy it. Sure the graphics suck, but the game is exciting and even with a choppy framerate, I can't let go of it! There are lots of shortcuts and opportunities to catch big air, the music is good and the controls are better than what people give it. Overall, somewhere around a B+ or A- in my opinion. The dialogue is corny but that adds to the hilariousness.
Ridge Racer 3D is my favorite of the two, mainly because I have never played a Ridge Racer game before! I'm glad I purchased this, because it's clearly one of the system's best. The controls are great and the tracks look amazing, especially in 3D! Using the X button to accelerate and the A button to drift is surprisingly intuitive. The game is super fast and the music is also very good. I love the skylines, especially the one in the airport! Overall, fantastic game, around an A- or A.