I guess it's different strokes for different folks but we have a Presto and a Mirro. One 16.5 qt. and one 22 qt. so far as canning goes, if you're canning in quart jars, the 16 qt. will hold the same number of jars as the 22 qt. SEVEN. Now in pints you can double stack those in the 22 qt. size to increase production. Concerning seals, I would much prefer to insert a new seal in the lid each year and fasten the lid with one simple turn than have to fool with all those clamps and tightening them down each time you put the lid on or take it off. Just saying. A tiny smear of cooking oil or petroleum jelly occasionally on the seal will take care of the sticking. Lastly, a new Mirro 22 qt. is $300 less than the All American and ours have been in use annually for 40 years so I doubt anyone is going to wear out either brand.
