Is there a time period on those razors? Now I'm curious if phrasing was a chronological thing. Somewhere around a certain time period it became more popular to use one word over another?
For the Miller razor, Tweedale's lists him as being at Fargate between 1833 and 1849, with his son joining as the Eldon works was established in 1852, so I think this razor would fall in the 1830s-40s.