They are all truggy's however the Muggy is a heavy weight. i belive the boxed version is over 30llbs. and the overall size is alot greater than its competitors..
If your looking for a Truggy to play with, the Muggy is a sure shot, but for the track your already the underdog, just with overall size/weight.
Not sure where Losi was going with that one.

I would have a look at the Mugen and the 8ight-T. These are race winners and really fun to drive.