I have an OCD. Both get equally the same strings and restrings. The other one which I bought a few months later is absolute fine. This is what me makes curious. Both weight exactly the same. So how does one racket gots worn so down, while the other one is fine without anything? Also the ping of both is different by 10-15Hz, which sounds like the heads are not equal. Sizing and shape is absolute the same.
Now suprise: MY SW35 had the same issues. One was going strong, one was weak, but here the older one was the stronger one. I guess following:
We talked often about the bad QC and I think that Victor don't distribute the graphite consistent and well, which lead to same frames which feel different. Also the JS10 in the picture has a slightly different feel. Call me paranoid but I'm sensitive enough to feel it. The head weights are the same, but I think that both heads of mine have the graphite differently distributed.
We also had the same in the JS12 thread and the guys also had this problems on tame tensions with thin strings.