Re: Would Spock Prime think Kirk and a young Kirk Prime look identical
Without knowing precisely how uniform colors are chosen, it's certainly possible that an officer could just pick the color he wanted as long as his background fit within the division in question and he logged hours in that area while serving in his current post.
Another example of alternate uniform colors would be Spock, who wore the white of the command division after being promoted to captain, but served as science officer in addition to his duties as Kirk's XO following TVH.
--Sran
We've seen people in the wrong color uniform for their posts before, like Spock wearing gold in the second pilot (though since he was both first officer and science officer, I guess either could've worked), or Charlene Masters in "The Alternative Factor" wearing blue despite being an engineer (and having no rank stripes despite being a lieutenant). Data was effectively TNG's science-officer character, but he was in operations gold because it looked better with his makeup.
Come to think of it, Harry Kim was nominally the operations manager and wore gold, but he functioned as the de facto science officer just as Data had. Maybe the same goes for Beach. I can see how an ops manager could fill a role similar to that of a science officer, since their job is to coordinate the activities of the crew, allocate resources, and so on, and on a ship primarily dedicated to science, they'd have to keep on top of the science-related activities. It's a reach, but there's certainly more than a little canonical evidence to support it.
Without knowing precisely how uniform colors are chosen, it's certainly possible that an officer could just pick the color he wanted as long as his background fit within the division in question and he logged hours in that area while serving in his current post.
Another example of alternate uniform colors would be Spock, who wore the white of the command division after being promoted to captain, but served as science officer in addition to his duties as Kirk's XO following TVH.
--Sran