Upon further inspection these rotors measure both 32mm thick which is spec'd as new (1.26" or 32mm). One was 32.1x mm and the other was 32.2x (probably the difference was my crappy caliper) differences of around .04 to .07mm
So they are basically both new. One is the gold version ring and the other is black. Cheapest solution is powdercoat the gold one black and save over $500.
This version is actually $555 new EACH on Summit.
https://www.summitracing.com/parts/dba-52992blkxs