Have a Ghost Firearms upper in 300 blackout and was wondering if the burnt bronze cerakote would match an Anderson burnt bronze lower. Trying to decide whether to spend the extra $130 on the stripped grid defense lower to make sure the colors match or save a few dollars and go with the Anderson.
Probably close - but no way to be sure until you have both in hand. I've bought a bunch of mis-matched ODG sets even from the same supplier - Aero - they are close, but if they did not come as set, they're usually a shade different.
Burnt Bronze has been more of an issue, as the 'burnt" is subjective to the supplier.
If you are really worried about the final look - coat the lower after you get it - but personally, I'd save the dollars and use the savings for ammo to shoot in it.