I have, and have used both WGDGPS 3.0 and Menz Powerlock Sealants.
Both are excellent, both seem similar in some regards. WG 3.0 is a pastel yellow, whereas PL is a pastel green shade. Viscosity of both products are about the same. Both apply similarly, and remove similarly, and both give outstanding end results. Powerlock seemed slightly slicker in feel, but no side by side to confirm, only going by memory.
I've noted a slight difference in smell, and as for longevity between the two, I've never done any scientific sort of tests to see how one holds up against the other?
I did once think that the Powerlock had a tendency to attract more dust than the WG product. And again, no proof positive testing in this regard, as here in the southern NM desert, there's a continual never ending assault of dusts, some days are bad, and some days are worse! LOL
I assume the WG 3.0 is a custom formulated product for PBMG, that is quite similar, yet has a slight modification of the similar Menz Powerlock formulation. Hope that makes some sense.
Mark