I ran both 1/10 and 1/8
I perfer 1/8 because of its excellent handling. 1/8 cars do not really need options.
1/8 car is relatively more expensive to start with. However, to improve 1/10 car, you need to buy options which cost u. In the end, 1/10 car costs about the same as 1/8 but 1/8 handling is still better.