I was so into the Q Power after playing with the Q Quality until Stiga released the Mantra Pros. Now I'm like I know the difference between Q Quality and Mantra Pro M and I think Mantra Pro M is better, well I would say better in most situations on BH.
Q Quality I would take over Mantra Pro M on FH side I think, but there is Mantra Pro XH. And now there is Q Power which should be similar in hardness but the pip structure seems to be a bit different and Mantra Pro is closer to the H3 pip structure while Mizuno Q Quality and Power seem to be closer to Tenergy05 or D05. I don't know why but I feel more ease of use in the bit shorter pips of H3/Mantra Pro with the increasing column diameter towards the top. (Especially in counterplay)
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But! If I would play in a lower league I would take T05 or V>15 since lower-level players don't put much energy in the ball so I would ask for all the help from the rubber that I can get.
It's a totally different game to play against a guy/gal who uses anti or some dead Sriver from 1973 than some higher level player who has good spin and speed and can vary it on demand. Against weaker players, I would take T05 or V>15 any day over Mantra Pro. (H3 in this regards in a liability)
I mean I don't know about you guys but hitting a knuckleball with quality spin and speed is not that trivial and Tenergy05 is really good in that department and so is Q Quality.
Anyways Mantra Pro is pretty cheap from TT-Japan, the XH is certainly significantly cheaper than Q Power, and on higher level it works better than the Mizuno offering since it's easier to use and not that sensitive.
I would take the Q Qualty and Q Power over pretty much most ESN offerings, maybe I would consider G-1/ V>15 for backhand and for forehand Tibhar K2 or Golden Tango. But I'm glad Daiki is so competitive now.