Well I don't know about the slicks that come on the China bikes.
Slicks in general are suppose to offer far superior performance than a treaded tire on the track in dry conditions.
The slicks I use work better than any treaded tire I've ever ridden on. Whether they were China made stock tires or aftermarket *** performance tires....
Slicks are the way to go if your racing but if your just cruising around then it won't make much of a difference.