Ce n'est pas la même surface ; mais ils ont la même mousse (RITC Japanese Sponge). Le Wang Nan devrait être a priori plus rapide que le 729 "classique". Mais dans les deux cas, la mousse est du genre medium (sans doute comme Sriver).
WANG NAN :
This is a Well-rounded rubber with the ability to generate Quick Loop as well as mid distance Loop. Japanese Sponge version will give this rubber more hitting power and a livelier bounce.
Japanese Sponge Version
Fast spinning
Quick attack and Loop
For initializing attack
ITTF/USATT/CTTA approved
Specifications:
Speed: 9++
Spin: 9++
Control: 9
Deception: 0
Sponge: 2.2mm (MAX THICK)
Staff Notes: Japanese sponge will give the Wang Nan top sheet more bounce. Japanese sponge gives this rubber a lively feel some European players prefer in a Chinese rubber.