Multiplex makes good servos, we used them for some time. You may gain better service from the gear train but thats about it IMO... I am not familiar with any newer Multiplex servos, I believe there were some new servos on the drawing board, not sure if they hit the market yet.

8411's have gained a reputation for gear train wear in short order as compared to others such as my favorite the Hitec 5945's...