Different consoles (See: PS2 for both RBs, Wii for RB1) have shown to have different engines in Rock Band and Rock Band 2 (Vocals/Drums for Wii/PS2 RB1, Drums from RB2 PS2). It'd be a nice feature to have, but aside from the engine differences, I'd think Scorehero will have to wait until the site re-write (link) is finished.
This is my sig until it stops being my sig.
Ce n'est pas une signature.
>tfw you will never have as many posts as bjw ;_;