Just uninformed opinion here for what its worth -
I've seen these filters discussed in Subaru groups and I'll summarize what I've taken away from all the talk: There are full-length, Hoye-size, and short versions that will all screw on to this industry-standard mount and will filter ok. Short ones come up to full oil pressure faster, and should be changed at more frequent intervals due to less filtering surface. (Most engine wear occurs in the moment before oil pressure comes up so a small filter that fills quickly is better in this aspect).
Longer filters cool the oil better and contain more oil as well as have more filter surface area, so are better suited to equipment that will be run hard.
Quality of the drainback check valve inside the filter should be irrelevant for the Yanmar operator who always cranks with compression released until the oil light goes out.
And finally the pressure relief spec relates to a plugged filter that bypasses. I hope nobody here lets their oil get that saturated with crud! Most of us don't put a lot of hours on per year so we aren't likely to see plugged filters if we change at reasonable intervals.
So - my opinion is: the quality of the filter is relevant, but any quality filter made for that common family of Subaru/Toyota/Nissan/Mazda applications and is made to modern quality specs, will be fine.
