Great feedback. Thank you.
The Stahlwille 13s are also bookmarked for me. Definitely on the high end of what I would spend.
The Facom 440 (and USAG and Sidichrome equivalents) are very similar to the Stahwille 13. They are made to the same DIN pattern.
-Rings and open ends of very similar dimensions.
-Facom box is slightly more offset down, to enable reaching recessed fasteners.
-Stahlwille is noticeably lighter, from thinner beam (which may be less comfortable as a result, both are scalloped out in middle but the max thickness of the Facom is a bit thicker than on the Stahlwille)
-Facom are slightly longer in the smaller sizes (but this switches above around 19)
-Facom are size labeled in 4 places, unlike 2 on the Stahlwille, and the Stahlwille "13" looks confusingly like a size