Looking through and trying to understand "Sukhoi Interceptors" by Yefim Gordon - the "Fishpot-A" designation was given by NATO to an experimental Interceptor called the T-3 which flew at a 1956 Airshow and had no radar at the time. About a year later it was given an Almaz 3 radar and PVU-67 computing sight, SRZO-2 IFF system and launch control system for KL-7L AAMs.
The nose point does not come from the centre but covers the top half of the nose so it looks different to the Fishpot B.
The T-3 "Fishpot A" had no guns (it was designed to have a two 30mm cannon) - and there were a lot of different prototypes in this book leading up to and after the Su-9 Fishpot B which was the only production version (~1000 built) - Some early Fishpot Bs had gun blast plates installed looking at these photos but no cannon were installed.
So officially the Su-9A is the Su-9 Fishpot-B - There was no Su-9 Fishpot A, but there was a T-3 Fishpot A
Heres a photo from wiki of a Sukhoi T-3 Fishpot A complete with KL-7Ls: