You get what you pay for. Get the rb6
. Still have schumacher stuff but I prefer everything in the kyosho , I mean everything(the rb5 in some ways was lacking compared to the svr).
Chassis - svr cheap stamped aluminum easily dented mine on the sv2, rb6 - machined 7075 which hardly scratches
Shocks - no comparison box stock k shocks are better than others with all the bells and whistles
Fit and finish - about equal with schumacher being more brittle
Diff - pain in @$$ to build the schumacher but comparable to the kyosho when done right
Wheels - schumacher still has the old style pin wheels and bearings up front