Answering for my wife the no forum or social media chat person. She tried both and chose 42 because it was superior for the watch being an information machine and for reading the screens during activity apps while doing them.
On looking feminine, she got gold with cocoa strap and also uses the white strap my watch came with.
FWIW: One of our kids got 38 because the physical size was closer to watches he's had but it exchanged it for the larger size for same reasons my wife chose it.
We all like the larger size for "scribble".
I realize people have many different life styles and activities to our family all going for 42 might not apply to all.