The reason a well-driven tamiya F1 with a Mabuchi 540 can keep up with a stock tourer is because of the F1's considerable weight advantage, not a superior chassis.
I expect that if the 4wd and 2wd F1's were to run at the same weight, the 4wd's would be faster - just like in off-road, where a 4wd car is normally worth a lap on a 2wd.