Well, I decided to keep the El Hierro. Not super happy with the contrast with hands and face, but it started to grow on me. When doing research, didn't see any side-by-side pics, so thought I would give everybody some comparison pics of similar sized watches. The Oris El Hierro states 43mm; the Ball Fireman NECC states 43mm; and the Marathon TSAR/GSAR states 41mm. My wrist size is a shade over 7", but it's flat, so it seems a little larger. I'm not a photoshop expert, so please excuse the amateur nature of the side-by-sides.
Oris on bottom, Marathon middle, Ball on top. 2nd photo, Oris on bottom, Ball on top.