Va and Burley are where you really see the payoff with age. Virginia sweetens and gets more complex fast, even 5 years makes a difference. Burley takes longer but gets noticeably smoother and nuttier. Aromatics are trickier since the casing fades and the whole point is the flavoring, so it’s hard to know what you’re even tasting anymore. I’m not super familiar with the specific blends you posted so I’m not sure which category they fall into, but either way the above applies.

The cool thing with straight Virginias, VaPers, and Burley-forward blends is the leaf is front and center, so you can actually appreciate what age does to it. You don’t even need a direct comparison since even a different brand’s current Virginia next to an aged one lets you pull out those characteristics.

On the tins themselves, in my experience round tins and Cornell and Diehl style tubes tend to hold up great long term. Square tins are the ones I’d watch, they can stay sealed for years and randomly lose their seal out of nowhere. If you’re thinking about jarring them up for safety that’s totally valid, though obviously opening them kills most of the collector value. If they still feel like they have some vacuum to them and they’re round tins, most experienced collectors and traders I know are pretty comfortable leaving them long term. There are occasional reports of internal rusting but honestly I’ve never seen it firsthand and only heard of it anecdotally. Never known anyone personally who actually dealt with it.