the 2012 has some advantages over the older bike: EFI being a big one, fully digital, and a bigger gas tank with better mileage, the wheels are different sizes from the older speedies and Americas so tires are more available (tire options for the older bikes has dwindled recently)

side by side the EFI bikes seem to have a smoother power curve and a bit more low end.

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter