So guys, I have a MX JJS and I am looking for something similar to it, preferably some racket that is as stiff as JJS or slightly flexible. And I have heard that MX90 is identical to MX JJS, is that so?
No first hand experience yet but from what I've read, the 90 and JJS are very similar, not exact. You might want to try out the 90, it may be close enough to meet your requirement of something like the JJS.