I don't know the TRF-501X so I can't comment. Apart from the fact that Japanese cars are generally stronger (true not only in RC
)... And TRF is japanese like Yokomo and the D4.
I have a BJ4(=B44) and a ZX5 (non-RTR, so my plastic is stronger). I don't find one stronger than the other...
Since you mention breaking wishbones etc, I would put a special mention to the HotBodies D4. Further to being designed by Japan culture, it features rubber bushing for the wishbones. It provides very clever damping from shocks on wheels (most of shocks)