I have a customized on with a 442 drop point blade. I also have a 112 and used to have <sniff> a Buck 500.
IMO, the Buck 500 is the best of the 3, by far.
I generally prefer drop point blades over clips. I can cope with the 112 blade though. For some reason, it just looks right. But at the end of the day, I prefer the blade on the 500 over the 112.
The 500 is thinner and to me, that's what wins. Given a choice between the still heavy but thin 500 and the light but boxy Ecolite 112, I would choose the 500. And regularly did until it pocket ejected this past spring.
So, my 112 classic and Ecolite 112 sit around basically unused and I've not replaced the 500 yet.
Why? My Ecolite, my 112 and Bucklite Max Large and Medium lockbacks all developed vertical blade play. I've since move to carrying an Opinel #9 and find the flat ground blade to cut better than the hollow ground Buck blades in most situations and I've found the Vibrolock mechanism to be more durable (by far) than the Buck lockback. Buck will need to earn me back as a customer at this point and they have a way to go.
But, if I were to try them again, it would be with a 500. Easily my favorite Buck.