There seems to be some differing opinions of which is best. Some say the least pressure is best but then there is the other side which asks if you are using ten+ PSI coming from the reg, why not just go with a check valve that closes more firmly?
I have not had issues with either, so tend to ignore the question but if I were asked, I might come down on the one which closes more firmly as it would seem less prone to letting a slight amount of water leak back past it?
I occasionally run into this when using check valves in water lines. A swing check is just a simple gate that swings shut on gravity to seal. They tend to let water leak back so I use a solenoid when I really want a seal.
Entirely different application but I see no reason a 5-10 PSI will go open the check valve rated 1/3 or 1 PSI. If we were speaking of diy co2, yes, I would want the easy open one.