I knew Pollard would have the science behind it :-)
I don’t have any experience with how long each Works storing things, I use them for different purposes. I don’t use the food saver for long-term since the plastic bags are permeable.
I used to love their resealable bags. Until I realize that 90% of the time they lose the vacuum.
Now selling stuff in mason jars I use both ways. If I think I’m going to use something again I will use the foodsaver. It’s great for using and resealing. For things that I think are going to sit on the shelf for a while I will throw in an oxygen absorber.
The seals with the oxygen absorbers are much stronger. Every now and then one of the food savored Lids will come loose. I also noticed when I try to pry the lid off, there is a much bigger suction with the one with oxygen absorber. With the foodsavered one I can usually pry it open just using my fingers, and with the oxygen absorbers I’ll typically need a jar opener. Or whatever they are called, those little tiny can opener thingies.
It sounds like you both have done vacuum sealing in jars. I have been dehydrating garden veggies and tried to vacuum seal in my jars. I can’t get it to work. I even bought new caps and hose to use from the company. Is there some secret to putting the caps on over the lids and jars?