It is just a revelation of their style as professional players. Liu Guoliang is one of the fastest-paced player in his prime, and Qin is known for the slow tempo game. However, I doubt that Liu's ball is spinnier, just compare the trace. Both training is necessary, and the aim is quite different: Xu Xin is training to improve the ability in defense-offense transition, while Ma Long is more focused on power and precision in forehand counterspin.
