I recognized the 4100 from HQMilton.
In any case - I am a huge fan of "smaller watches" - most of my collection is in the 35-37mm range.
I've tried on both - there is something about the RO that screams to me that it should be 39mm...I don't know, maybe it is just me.
That being said, of these, I think I am in favor of the 14790.