Is there any consistency LOL ANyway I have a 6P usa and bought a spare talicap and it is still red but a COMPLETELY different shade than the one that came on the light.
Surefire is quite notorious for mismatched anodizing. Most people don't seem to mind, and surefire is more concerned with making a product that is solid and reliable, mismatching anodizing doesn't affect the performance of the product so surefire doesn't make it a priority to make matching parts. You will see much more mismatching parts with lights that feature type III anodizing than lights with type II. Almost all surefire parts I have in type II anodizing match pretty darn well, whereas my type III anodized parts are all over the place in color.
Final color of hard anodizing depends on many different factors including alloy of aluminum.Surefire is quite notorious for mismatched anodizing.