Strava doesn't have complete coverage, especially on newer trails, but more importantly: doing the trace via Street Complete attaches it to an OSM note with an optional (but encouraged) photo. This additional context makes it a lot more useful for editors than an ordinary trace, which can just as easily be an actual trail, a desire path, or someone deciding to improvise a shortcut through some brush. Even if the note just contains the word "trail", that helps us (though more detail is greatly appreciated, of course).
Though if you like StreetComplete and want aerial/satellite, there's SCEE, a fork of StreetComplete. I tried both Vespucci and EveryDoor, but neither is nearly as easy to use in my opinion.
I have my mapping spells where I do OSM mapping for a week or a month and then I might not map for a year or two. For mobile mapping I have all those you mentioned installed. They all are useful for something, except perhaps StreetComplete which is just a crippled version of SCEE for me. I also have OSMFocus Reborn installed which I use if I want to inspect ways and nodes in an area when I'm not in the middle of editing/adding anything with one of those other apps. That app is good for quickly checking some things out.