[damselfly]

I can't comment on the speed passion you refer to as i've never owned one. I do own a Fusion Exceed 10.5 though and can't say a bad thing about it. The motor and esc have never gone above 120F and average about 105F after 10-15 mins of heavy use. My car has a transmission ratio of 2.6:1, and I use a 31/80 pinion and spur taking my car to around 40-45mph and there's scope to gear higher with my temperatures.
Superb bit of kit with some excellent programming options.
With the optional programmer you can also check your top speed, average speed, max temperature, current temp', and numerous other things.
Love mine.