It is really hard to compare brushless vs. brushed. They both ahve different characteristics and feel different. The torque on the brushless is proportiantely higher for a comparable RPM motor, so there is going to be trade offs. Plus the drag feels different since brushless has almost none. The 5800 is the stronger of the 2 Novak ones. Novak's web site has good info. The motors are rated by Kv which is why they are named 4300 and 5800, but that only matters in the unlimited mode.