Dino is right but the differences he sees are accidental and minor to my eye compared to what PeterD called a white line around the coin. The lower image added a ring light directed on the edges of the coin in the hope
of making the serrate edges more distinct. The question which I could not ask in the first post without prejudicing answers is whether this added light made the result look unnatural. The number of people who did not mention the edge difference suggests that was not a problem to them but PeterD saw it even more strongly than I did when calling it a white line. I believe the effect is a bit
too strong so I'll have to try it again with less rim
I decided that I preferred black backgrounds except when the edge of the coin was a factor as it is with serrate denarii
when the gray or white backgrounds looked better. However anything added to a light set up that shouts out that something unnatural is being done is not good
. Below are the same images as above (now left and right) with a compromise in the middle showing a weaker edge fill in the hope
of improving the edge rendition without tripping the 'unnatural' look that PeterD so correctly observed.
Many coins require being photographed several times to get them the way I want them. It is not a matter of right and wrong but very much a matter of opinion.