(All figures manufacturer-claimed, because I couldn't find 2006/2007 S2R dyno runs)
Buell XB9SX:
Displacement: 984cc
Power: 92 HP
Torque: 95 Nm
Ducati Monster S2R:
Displacement: 992cc
Power: 95 HP
Torque: 94 Nm
So, Ducati does a "really good job", and Buells are underpowered?