I'd have to say the square (second pictured) looks to suit you best.
Personally, neither the square or round suit me... only 'geometric' (not the 'aviator') and they're damn difficult to find anymore what with the square taking over what sure seems to be 90% of all offerings (I sure miss the 90's in this area). I have a bit of an odd face build. In-between round and square (and large/wide) so lol. Don't know what I'll do if they stopped making my frame shape altogether. Especially Oakley RX, ever since that last pair literally saved my neck in a work-related incident, I'll never buy another brand of RX frames again so long as they're still being made. They are indeed as rugged as advertised and worth every cent, not flimsy at all.
For the curious, I'll probably never find myself in a similar situation again, but if I did, I'd come out no worse. Long story short, I got caught between a motorized gate and the post when delivering a package (guy hit the button twice; as trained, I was bending down to slide the package behind the post. Big mistake) and the damn thing didn't have a safety stop so it kept trying to close on my neck/head with greater and greater force, forcing it the wrong way. People, men and women, have died under that same circumstance with those gates (by law, they are all supposed to have the safety feature but this one didn't). The fact that these frame's arms didn't break, didn't even bend at all, and therefore affording me the leverage necessary to get it to slide off my face when I lifted it up and threw it off of the track, saved my life. Oakley RX fan for life now. I only came out of it with a little scar where they cut into my face a little (yes, it really was a tremendous force). Sadly, the screw on that side was stripped to hell (again, a tremendous force) and they fell apart a year later, but I don't knock them any for it. They served above and beyond their purpose that day.
Bonus, if you accidentally nod off with the Oakleys on, they won't get bent out of shape from that either. Every other pair of frames I'd ever had before, the first time that happened they never fit right again (was a major pet-peeve for me).
