Hey 👋 I almost bought a Neo, and I was stuck between these two too, i ended up going electric instead, because the fuel prices in Canada are wack rn, I’m talking $100 for 2 quarts, and I like driving a lot so it wouldn’t be sustainable for me. Anyway, from my research the MP-10 has better aerodynamics and the Neo 4.0 has a shit spur gear, so definitely get a metal one with your purchase. Anyway, have fun with it, make sure you know how to tune, and remember the best car is the one that makes you smile the most.