The only thing they have to double up is handling, MNR was not nearly as good as newer Mario Kart games (MKDS, MKWii, MK7) in terms of handling, it's true it had more features and a better online (at least compared to MKDS, MKWii), but in the end the handling and tracks design makes the difference.
Also, really 30fps on a ps3 is ludicrus for a Kart game. I already find inexcusable MK does't run 60fps in 3-4player on Wii (expecially considering Double Dash was 60fps in mutiplayer), let alone on a 10 times more powerful ps3.
The only true MK competitor imo is the old CTR because it has outshined Mario Kart 64 in these most important features, handling and track design, MK64 had a better weapons and a better battle mode tought.







