In the early days of the Pulsar product line, I think the A scopes lacked the Picture-in-Picture zoom reticle, but the current production units have it now.
I recently purchased a 50A after a lot of research and shooting though different scopes over the course of a year. The OLED was easier on the eyes, but I don't think it would make the difference between identifying a target or making a shot. It was just not worth the price difference.
NRA Lifer / Member TSRA