Well, first of all, that car/chassis is not an official release from Tamiya. I think he got had the chassis custom made from somewhere.
It could well be modeled after the Kai Racing Factory's limited edition graphite chassis kit for thr 414M.
you can compare the two here:
http://www2u.biglobe.ne.jp/~kmodels/414mkailimited.htm
As for the performance differences of this kit... can't really help you.