Would it be possible that there are changes or improvement on the topsheet or sponge were made and the ones being used right now are originally not as good as the one were first being used???
Vega pro is spinny but to say it is close. To the level of Tenergy seem a bit off. If Vega pro is spinny for you, you have not tried any Omega 7 series yet.
Having the same color for sponge and topsheet does not equate being the same rubber. The asia df is nowhere near Omega VII's speed and spin. Also, the Omega VII rubbers are much more durable.