The A6 is better compared to the S2 or S2+, after all it’s a tube light. The M1 is a “P60 host”, with a wider head and larger reflector that gives it better throw than a tube light, be it OP or SMO.

A better comparison for the M1 would be, as I mentioned before, the X6.

(Also you can get the M1 with other firmwares, like mine has Biscotti.)