Nutshell. I'm upgrading front brake. MikesXS drilled disc and 13mm Yammy MC Pandamonium brake kit Braided lines. The question I have is that I've got access to 2x Brembo callipers for a good price. 65mm which is the required bolt pattern. Now everyone on here has been talking about GOLD calipers. These are BLACK. Is that purely cosmetic? I've attached pics. They look like in good order but seller not able to provide history. Am keen to get brakes working very very well so any feedback appreciated.