glenna-thank you for your answer.
In our club we have quite a few different brands driving around our track. And from what we have seen is that a higher IG Awesomatix internal gear ratio gets much easier around our medium/small track then lets say the Tamiya with 1:85 using the same FDR. Its quite the gap between them. One sort of needs a completely different tactics in gearing with the two different cars. This is why i asked the question, i have seen it, but i really do not understand why and how this happening. ( cars tested with the same electronics )
any more insight is highly welcome, and i agree, its very interesting.