I have a Vortex Venom on my Glock 10mm that I use for hog hunting. The viper has to be removed to change the battery, the venom does not.
I have the 3 moa because I wanted to shoot out to 50-60 yards and also have a more precise dot.
I also bought a Glock 19 MOS and added a FF3 with a 8 moa dot for faster shots on targets. Only reason I didn't buy another Venom is I wanted the bigger 8 moa dot. Our sport (GADPA) allows a slide mounted optic in the Concealed Carry Division. I have enjoyed shooting it and recently sold it and sent my P-07 to CGW to have it milled for the FF3 since I like CZ much better and really did not have a place for the P-07 since IDPA rule change took it out of Compact Carry division..
I found very little difference, to me, between the 3 and 8 moa. Adjusting the brightness makes the dot bigger or smaller so the Venom would have worked fine for me.