Howdy James!
I have the less-expensive boots from Fall Creek. They are a sure thumbs up! Unless you plan on wearing them on slick floors or on ice, DO have them install the heel plates at purchase time. I didn't, and wore down a surprising amount of leather heel material while at the NCOWS Nationals which, I think you'll remember, had no pavement, but lots of gravel. Again, 'tho, they're VERY nice boots and well worth the $$$s.
By the way, I have read - but can't quote, that there WERE in fact, different lasts, therefore separate R&L patterns used since the Rev. War, 'tho the single last was most common , except for the well-to-do. By the (un)Civil War, R&L shoes and boots were pretty common. Also, there were 2-piece fronts available, but as Deadeye Don (sorta) said, the 1-piece front was much more common. (If you go to the Fugawee site, I THINK they have information and history about times and styles.)