Your 4MOA emitter in that H1 variant is the same 4MOA emitter found in any of the full-size Comp series Aimpoints -- the Pro, the M3, the ML3, etc.
Due to the Micro series sights having a shorter body than the Comp series, it actually shows as about a 3.3MOA dot. That's part of the reason why that dot only looks a little bigger than your 2MOA variant, cuz it's not really a full 2x the size.