They are both identical rackets with a different paint job. One is red and one is black. IMO they both equal in lookings.
I owned both before and I prefer 9 (gery) more. Looks really nice with black or dark string on it. w9A is just like another Yonex from a distance.
I have both the 9 and 9a. Both have different finishes. The grey one has a glossy finishing while the 9a just has paint finish. Both looks pretty good but I prefer the red colour.
It terms of colour between the 9 & 9a, the 9a is a bit more pleasing looking although it doesn't have the gloss finishing like the 9. Woven 9 is a bit dull in colour. I am not sure with the others but I felt 9a is slightly heavier than the 9 though.