I don't even know how to judge, but I'd take a guess that the 2.1 and you shot the closest together round scores. Then the rookie and the +2.8 were next closest. The seasoned vet maybe a runaway? I'll throw out a guess for score averages for 3 rounds too.
Tour 1, 66.3
Tour 2, 67.6
Member 1, 68.3
Member 3, 71.6
This is a complete shot in the dark as I have never played tournament golf and rarely play with sub 4 handicap players. I'm assuming that these were in competition and projecting psychology on it a bit. I'm probably overestimating the 2.1 in competition, but for some it makes them play better.
Whats the course rating/slope for ladies?
From 6300yds, I feel like it'd be a close duel between the +2.8 and the ladies. Stretch out the distance though and I'd be favoring the +2.8 more. Hovering around a 0, you may get close with their rougher rounds, but I'd think you're out of it.