hentfreak77 Most scenes from most studios will be 180 degree SBS (side-by-side).
SLR Originals and (I believe) StacyQ scenes will be 200 degree fisheye format.
Specifically in terms of which one you select or is auto-set for you with the SLR app, the "best" option is just the one it's meant to be played in, as if you change it to the wrong format the picture will look either stretched out or scrunched up. Basically you need to play it in the correct format it was meant to be played back in, otherwise it won't look right.
But in general the SLR app should default to the correct output for each scene anyway whether you're streaming or playing locally, since it's based off the file name (p.s. don't edit the later parts of file names like "MKX200_FB360" etc. or it can and will mess this up).
If I'm not following what you're actually asking just let me know 😅