Both will do around 7 million, it wil be 1,5 million difference at max. Why?, becuase GT5 will be to the PS3(and I bet the PS3 will have better sales than the GC) what DD was to the GC. I see MKWii having sales between MK64 and DD, but with more other good games coming out it won't pass MK 64 sales.

PS Vita and PC gamer
CPU Intel i5 2500K at 4.5 Ghz / Gigabyte Z68 Mobo / 8 Gb Corsair Vengeance 1600 mhz / Sapphire HD 7970 Dual X Boost / Corsair Obsidian 550d







