This is more of an encyclopedic rigging question, but perhaps someone
here could enlighten me:
is there a reason to choose a cotter pin over a cotter ring in any
application, or vice versa?

The kinds of applications I'm thinking are for locking turnbuckles and
clevis pins.

I know my boat has primarily cotter pins, but occasionally there's a
ring, and there seems to be no rhyme or reason to which goes where. It
seems that rings would be much less likely to snag on sails, and they
can also be removed faster and without needing a plier of some sort. So
are cotter pins typically stronger, or is it just habit that makes most
people use them?

Thanks!
Teri
S/V Shadow Line