Parksider
If the head size was equal between a pro-cut and weston, the pro-cut would win. But, since the #22 head size is much bigger than a #12, the 22 would win from weston in this scenario. The #22 Pro-Cut at only 1 HP would vastly outperform the Weston #22 at 1.5 hp.
On the shopping pages, there is a “shop by” (or “filter” on mobile) that has a section for manufacturer. You can filter there to choose Speco. We don’t stock many #22 from Speco but I think I’m going to add some more options there soon. This is what is currently stock items: https://www.waltonsinc.com/parts/grinders-parts/plates-knives/22-grinder-plates-knives?manufacturer=729
If/when I get some new options added there, I’ll let you know.
I really don’t have a great answer on the weston grinder knives for their length of use. They are made different from other knives, and don’t provide the same level of visual detail because of how they are designed to see the wear on them as well. If you are using them on all your plates though, it probably is time. For best results, you should pair 1 knife with 1 plate so they wear evenly together. Everything will last longer and be more efficient that way, but it does require more investment in buying additional knives to have 1 for every plate. If you’re plate is worn out though, it’d be safe to assume the knife is as well. I’d just use the plate as a guide for the knife on the weston versions.
I don’t know if the ice pack on the grinder really works. I think it is at least partially a marketing gimmick, but I’ve never fully tested to see if it truly makes a difference and keeps the meat colder. If the meat is really spending that much time in the throat of the grinder too, probably something wrong there or things would be better off with a faster grinder or bigger head to it. I kind of want to test this out though and find out for sure…