I think 140 bhp for a full monty gen 1 is a little optimistic.
Maybe with a full exhaust system like an Akra or Yoshi.
My full monty'd gen 1 made 135 with 78.71 ft/lb torque
Also if they refer to the MT10 as an FZ10, the chances are it's an American import which makes slightly less power. ( According to our American cousins on the forums)
My standard MT10 made 143.41 with 78.66 ft/lb torque.
It's the way the MT10 delivers its power and the way it freely revs which makes it feel so different even though the figures are very close.
You can see this with the distinct rises in power curves on the graph as opposed to the smooth and linear one of the Fazer.
My Fazer is faster top end but again the MT10 has a rev limiter which can be removed with an ecu re flash. (You can see the MT10's power curve was still climbing when it suddenly drops off).
Above 150mph, it's all about the aerodynamics and the Fazer is better in that department I think.
You don't have to ride the MT10 like a dick but.......you don't have to ride anything like a dick.......100mph+wheelies say you should