No, but speed and quality/suitability are two different things.
Kv = rpms per volt, so the HW motor is faster by a tiny amount.
The HW motor would be fine for the erevo, and if the Pimp says they work fine then thats a good sign.
The Castle motor would be more powerful & better quality/ temps no doubt, but it depends on your budget; an 80amp esc isnt ideal for a big MT, I would go go easy whatever motor you get..
Thanx. I think i will save my money and buyme a mmm combo...
Dill
Sounds like a good move, the mm combo can product more power than the hw80 and can handle higher voltage. So you can gear it for higher speeds and get more torque too.