The ratchet ones are all likely larger and very heavy duty/reliable in how their locking=in mechanism works. That's the type of jack stands I saw being used at Madison Cadillac on Union Avenue in Memphis, Tenn. in the early '70s when an old time mechanic was working on my '71 Cadillac 'ghetto-cruiser' I drove as a young man.

I have jackstands from 30+ years ago from Sears that are pin-style. Then, I have two newer ones also pin-style from I believe Chief Auto Parts here in Dallas, TX. now out of business. All, are each 2-ton stands, if I recall correctly.

I'll post pics - if I can get them back from Alex, my car dealer neighbor........

I would think the ratchet ones easier to use, and likely heavier duty, but that's a guess on my part.....