I haven't driven other cars (DEX210, X6) more than a few minutes, so I doubt it's a very good comparison - also as I didn't have a sensored motor myself back then (nowadays I do).
I am VERY happy with the car!
It needed little mods from standard to work well (as it should of course), though I'm currently trying out some mods that seems to work nicely (Dremeled T-plate, Gear diff).
The only things that bug me about the TRF201: There aren't many fellow drivers, so you do need your own spares box/bin and I doubt there's any trackside shop who has 201 spares in stock. I've only broken front lower arms, front shocktowers and front top frames/bulkheads so far though, so if you buy that, some adjusters and small hardware you should be ok - Durability it very decent - I do find the shock towers rather rigid, they are strong but I think one with more flex (like a B4) is even more durable. I'm going to cook my front shock tower in an attempt to soften it. Also, the spur gear cover gives a bad seal. Tamiya released an optional motor plate that's stronger and has a rib on the gear cover side, but it's still not sufficient, so I usually tape it shut. The wing mounts might get stripped threads after a while, just use longer screws and it's problem solved!
I think the purchase of the TRF201 is best justified if you want a metric B4 that looks the part!
Believe me, buy one and you won't regret it. Before my switch to sensored gear I was looking at getting something else next season, but my last two races with the new electronics went so well that I decided to keep it a while longer.
@Aussie Top Force: Interesting choice on the suspension hangers, I haven't broken a single suspension hanger yet?
As for the TRF spring set, it helps, but in the long run I decided for Associated springs instead: The TRF springs are all very soft (I think they are intended for dirt/clay use only) and won't cut it if you drive on astroturf as well.