I do not trust dp in any way; they make notoriously unreliable markers commonly known as the G series. Invert mini gets my vote based on my confidence; I know for a fact that a mini performs well consistently.
I have both and if the choice is with the 2 only then the G5 is the winner but if you add the Axe, then the axe would be my choice. I have 5 axes, 1 empire mini and a g5. My main gun right now is the G5.