I think the angled, pointed ones keep the main line in place better, but the last time I got some I just asked for whatever Causeway Tackle had. Bernie Hoyt who used to do terrific surfcasting seminars told his audience that he always used those paper clip snaps, arguing that who wants to spend time tying and retying ? As for me, now that for the last five years I only surfcast or fish from my kayak, being unable to keep out of the wind makes me tie knots only if something broke.