Isn't the Neo 4 Star a 4.5 turn? If it is it will run simlar to the upcoming Velociti 4.5
A Velociti 5.5 can't keep up with 7 turn or good 8 turn motors and any size track or any surface. One of my friends has a 5.5 and to go as fast as the top local mod drivers he has to gear up and this causes his GTB to shut down. If you run Open Mod wait for the 4.5. The 4.5 is on par with a 7 turn.
What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
Where I run: Florida Indoor R/C Complex/Thunder Racing/Florida On Road State Series