Any 190mm touring body will fit on any 190mm chasis elec car. The bodies come clear and uncut so all you have to do is punch holes and cut the extra lexan. However, some bodies will fit different on different chasis. But the dimensions are all the same and since you make the holes, you just make them where ever you need them according to the body posts on the chasis you're using.

A 200mm body is only 10mm wider (5mm left and 5mm right) than a 190mm (clearly). However, 10mm isn't that much. Something as simple as a larger offset on your wheels can make up for the difference in body. Since drifting is more appearence than anything else, most people don't use 200mm bodies unless they can get the correct wheel offset to make the wheels look flush. However, as far as fitment, the 200mm body will still fit just fine on a 190mm elec chasis. The wheels will just look sunk in instead of sitting flush.