Not much to discuss there..... NFS is one of the most impressive things i've seen on a cellphone screen. I know the iPhone has had it for awhile, but not at 854x480 resolution. The controls on NFS seem to be executed better than most driving games on accelerometer controlled devices. It actually seems to have some precision. All in all, if you're into racing games, NFS is about as good as it gets right now.
Seeing as how I can't even get NFS on my Droid, I'd say Asphalt... lol
I seen NFS on my coworkers iPhone and it looked good so if I can get NFS to run on my Droid it would be NFS hands down.
^^^^^^^^^^^ If you are running Froyo, set the default install location to the sdcard. It SHOULD work just fine. I say SHOULD because it works on mine, but as always, YMMV.
Asphalt seemed laggy with the accelerometer control. I would always be trying to turn slightly but it would take long to register. Then I hit a car head on. It would be me racing, making passes, getting into 2nd or 1st, then hitting a car and starting at the bottom again. Sharp graphics though for Asphalt, no complaint there. NFS is put together better all around. It would be complete if it had multiplayer over WiFi at least.