I like both, I have an upgraded 4.1 and just got the 4.3 rtr for my son. The 4.3 is a nice package but lots of areas that are lacking.
Had my GT in the shop last weekend and all the people coming in were like what is that? It is just a classic look, sucks how the manufactures has such control over the market. They can just decide to discontinue a series and boom a whole class of racing gone.