I just happen to come across this post and also have used both chassis for Touring and Drifting. Frankly speaking although Tamiya TT01 is crap but the E10 is even worst. At least the TT01 chassis dun flex so much and also the shocks on the TT01 can be change to TRF which are the best shocks in the market. And locally the price and the avability of tamiya is better and there are races held by Tamiya for TT01 only. I really
the E10 chassis cause it is like rubber and the centre shaft will cause problem unless u change to the new and "Improved" shaft.
For me i have race the TT01 for about 3 years and it is still holding up, but for the E10 i am not so sure how long it can last.
For me i will place my bet on Tamiya TT01.
P:S If u are learning get a TT01, if u are racing get a better car.
Just my personal comment.