I think it is all in the eye of the beholder. I have 8 Pietta 1851 Navy "type" .36 revolvers, but only two have the octagonal barrel. I have a soft spot for the part round/part octagon barrels.
Here are most of them:
1851 Navy 4-screw CFS (cut for stock) AZ/1990:
Leech & Rigdon CP/2016 and Schneider & Glassick CN/2015:
1851 Navy Second Model CM/2014 and J.H. Dance and Brothers BH/1996
Rigdon & Ansley CS/2017 and Griswold & Gunnison CN/2015
The 12-stop-slot cylinder was a project in itself to mill the extra 6 safety stop slots and approaches with the help of my neighbor machinist.
I have an Armi San Marco 1860 4-screw CFS BD/1994 with a very nice attachment stock, probably of tiger stripe/shell flame maple (not walnut). I have no idea of the stock manufacturer. I don't think it was made by Pietta, at least within the last two decades, as all of their present versions of a shoulder stock use walnut or European hardwood of some type, and are not figured anywhere near as nice as this stock.
I would like to use it with my next purchase: an Uberti 1861 Navy "military" 4-screw CFS. Gee Dog is correct that the Pietta 1861 barrel is 8", 1/2" too long (for historical purposes), and the Pietta steel backstrap does not have the recess on the bottom of the backstrap for the shoulder stock (very curious to me), which is why I will be going with the Uberti version. More spendy than the Pietta but it has to be as correct as can be in my book. The Uberti gripframe style will work with the shoulder stock I have. I lean more toward the 1851 "type" barrel/load lever style vs. the 1860/1861 streamlined style but I need an 1861 for my collection.
I will use a small portion of my stimulus distribution to purchase one. We are retired on a fixed SS income with a small monthly pension, so the unemployment woes affecting our immediate younger family members and many, many others are not the same for us. We will save the vast majority of it and any other stimulus distributions for them. We are well stocked with food and supplies as we always have been in the past, and we made a fairly generous donation to the very small local food bank yesterday. Most folks in our very remote town here (pop. 600+/-) are retired, old, and do not drive much, if at all. They rely upon the local small grocery market store and the food bank for necessary things.
To everyone on this board: stay safe and stay home if at all possible. We in WA State locked things up very early in March and the coronavirus spread is pretty much under control, so to speak. Our county is very rural for the most part, and we have only had 2 deaths among 17 confirmed cases. Take that as a grain of salt because this county (Lewis) has not the access to testing kits like the more urban/populous counties in Pugetropolis to determine how widespread the virus is.
Regards,
Jim