they are also much easier on packs. i only fly KDE motors for several reasons. smoothness, efficient, extremely powerful, and easy on the packs. they are easier on the packs than scorpion, but still give the same power IMO...
they are smoother and run more true due to their quad bearing design. the flip side, they are a little heavier, but no big deal to me.....
fyi, most guys who fly scorpion that i have talked to dont actually oil the bearings ever 5-6 flights, more like once a day or weekend if that. they are the same bearings as most other motors use, i dont see the point....others dont require it..