I haven't ran the mbx6 but I have raced a Losi 8 for about 2 years and recently switched to the rc8. The big differences to me were that I could almost drive the rc8 like a truggy compared to the 8ight and the rc8 has tons of steering. I do like that the rc8 can be driven SO hard!! Never got to try a mugen but I am sure it is really awesome!!!