I have had both a BJ4WE and a Yokomo MR-4BX. Both drive pretty similar if set up correctly.
extremely bomb proof front end
great in the bumps
easy to drive, smooth on the power delivery
rear diff takes a beating. I have to rebuild after every meet if it is dusty out. (easy to take out though)
belt tension is something I have to learn about and can be a pain to adjust.
lack of support in North America for set up & info
very low maintenance
lots of support
very quick response wise
I don't care what people say, the front end is still fragile
slightly twitchy feeling throttle wise
Personally there are good and bad for the both. I like the handling of the Yoke, but I miss the sealed drive train of the BJ4WE...and well...I just have been brainwashed to not drive Losi cars...