Good point, Jim. I was thinking primarily of the common, cheap grade trade guns like the Carolina gun, a gun I have on my mind to build. It will be based on the Bumford gun Flintriflesmith shows on his site, and also pictured in "Of Sorts for Provincials, pgs 61-64. For sure, there were different grades of English trade guns- inventories from the period such as orders by Sir William Johnson, etc. show a range of prices. If it was imported, I guess a gun could be called a "trade gun". I more commonly call the higher grade imported guns, "fowling guns". A nice example of the range of guns exported by one maker is the Bumford gun also shown in "Of Sorts... " on pages 49-52, which has a lock similar to your two round-faced offerings. The next gun pictured in "Of Sorts", a Wilson fowling gun which is much plainer, lacking engraving on the furniture, has a lock more similar to the Davis round-faced lock.
It's great to have choices.