Yes TONS the 140 sport doesnt have the power the DZ has. It is also not as heavy. The 140DZ is the most powerful 4 Stroke offered by YS at this time but keep your eyes open soon the 140 DZ will be replaced with the 160 DZ already being tested. Unofficially I have heard this. I believe they rate the 140 sport at just under 3 HP and the 140 DZ at 3.25 Hp thats a big difference for just a few ounces in weight difference.