yes, the 200m and 190mm is both different classes. 190 is the limited width of a 1/10 electric touring car. the 200mm is the width of 1/10 Nitro classes, the electric is just a conversion of the 200mm.
200mm cars are generally foam tires only. the 190mm offers more realistic bodys. 200 is always run on aspgalt as they destrot the carpet with their nitro engines(probably) there are a fewer manufacturers for 1/10 200mm than 190mm.
I would say that 190 class is the most popular onroad class right now. we use rubber tires on both asphalt and carpet with 190mm bodys.
a 190mm is faster on track with same tires as a 200mm.
i think 1/10 pan cars have a long way to go in popularity worldwide were 1/10 touring class is the king. But this also depends on area, in the US pan cars are very popular.
cheers//
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