That is why I posted, maybe the smaller dot uses less battery, it is the only thing I can think of.
I have almost never seen anyone in USPSA or Steel challenge use anything less than a 6MOA. Once in a while I see 3 MOA. But never an experienced shooter that was A or higher.
Look at a self defense situation, these are sports that require fast shooting at targets, some require movement.
Why would a small dot be better for EDC?
Like I said, I am not looking at hitting the button of a shirt of an attacker at 25 yards, in an indoor range with controlled lighting, I don't need that level accuracy.
I have 3MOA on my Carry Optics gun that I use for IDPA/USPSA/SC and pins. For me, 6MOA is just too large for some of the longer shots I make in IDPA and the tough shots on bowling pins that have fallen and leave only the top of the pin to shoot at.
With that 3MOA G34 I'm currently ranked as IDPA-SS, USPSA-C and SC-M. The gun's fine, the dot's fine - what keeps me back in the action pistol shooting is the movement - I'm old enough to be your father.
So, since I shoot that 3MOA G34 probably more than all of my other guns put together, I set my carry gun up similarly. The competition gun is an SRO, I don't quite trust that in the real world, I'm running an RMR on my carry gun. They're both Trijicon, both 3MOA; the comp gun is a G34, the carry is a G31 with a 9mm conversion barrel and a weapons light.
And of course, I have astigmatisms on both eyes, the 3moa gives me less trouble at distance than the 6moas that I've got on a couple of my .22's.
That's what works for me. Something entirely different may work for you.