Not as well as I'd hoped, which is why I didn't post a followup. I was only able to get two varieties - two brands actually - and was hoping to get a few more. Time ran out as, after a while, the pancetta started to lose its freshness while I was looking for more alternatives. It's not that the meat went bad, but it seemed a good idea to do the comparison with equally fresh samples. Now that I know where other brands and samples can be found, I'll try again in the next few weeks, and schedule my pancetta purchases on the same day.
I did compare Fra'Mani, Paul Bertolli's "artisan" pancetta with Molinari, one of the better - if not the best - regarded commercial brands in the area. There was a substantial difference between the two. Fra'Mani was less salty, less infused with nitrates, and less "smokey" - it had a more subtle, natural taste, closer to the guanciale I tried from A.G. Ferrari foods. I liked it quite a bit.
The Molinari was saltier, and tasted more like a typical American bacon, or more like I remember a typical American bacon tasting, as I've not had any in years. I've only purchased slices and chunks of slab bacon from non-mainstream producers. Getting back to the Molinari - the samples I had were a bit leaner than the Fra'Mani, which I liked as I prefer lean bacon, but the Molinari cure, which will probably be preferred by those who like a more intense bacon flavor, was not to my liking. Well, let me amend that - if I were looking for a more typical bacon taste, which I might at times, then the Molinari is a fine choice, although it was still a little too salty for me. Maybe blanching it for a bit would help.
As for the leanness of the two bacons, considering that they are natural products, I imagine that there may be some fattier samples of the Molinari to be had, and some leaner samples of the Fra'Mani.
Pricing was close enough to be comparable, and different markets would have somewhat different prices, so price, at least for me, was not a factor. When I buy bacon, I just buy the few slices I'll need for a dish. I can't recall when I've purchased more than four or five slices of any type of bacon, although sometimes those slices are pretty thick ;)
I never buy packaged bacon - haven't in at least ten years.
Hope this helps a bit ...