Are some magnet sets different in size?

Does anybody have an idea or can confirm if theres sizing variations based on spek color (or coating)? I recently picked up two different 512 sets from separate locations. One is golden ratio and the other is all gunmetal. (The picture shows one gunmetal magnet in between two magnets from golden ratio). After looking closely it appears the gunmetal magnets are slightly smaller (becomes more apparent comparing cubes as the golden ratio is a little larger and they don’t sit flush on top each other).

Initially, I was thinking I would be able to combine different sets, but I can see how this wouldnt be ideal for building given the size difference. I also noticed some differences in the clear case and the splitter card and was wondering if this could be hinting at an explanation (or if the company changed their manufacturing in between these models. Was curious if anybody else has experienced this or it its just common knowledge lol

Thanks!!