A box stock spec motor class will benefit smooth drivers who don't make mistakes.

One thing to consider though is the body. A lower body will offer a little performance advantage or over a taller body. Also a body that includes a racing rear wing may offer a little more rear stability since the base TT-02 kits don't have adjustable rear toe-in or camber.

Tamiya 58639-a comes with a Mercedes AMG GT body and is a bit lower than a Tamiya 58699-a that only comes with a small rear spoiler.

The other thing to consider is what speed control is included with the kit (if any). Some of the kits include a Tamiya ESC that can run brushless and brushed motors. Some of the newer Tamiya TT-02 kits include a HobbyWing 1060 brushed only speed control.