I've never flown next to another Anafi, however when flying close to the house and hence our home WiFi, I have occasionally experienced a slight delay on the manual flight response. You should be OK, particularly if you manually select different channels, but I would still be prepared for the occasional delay in flight input.
I wouldn't advise doing any Blue Angel style manoeuvres.
I had a rather different experience... both drones had real trouble connecting and kept disconnecting in the air and returning home. Anafi worked fine when flying with a mavic air though.