Building multiple U-Boot configurations

Just wondering if there's a clean n simple way to modify machine/recipe configs such that I can build two versions of U-Boot - one for development, one for production.
Obviously I'll need to watch out for which one is 'deployed', but unsure of a nice way to get two built - separate recipes which pull in the different configs/patches?
Any gotchas I'd need to be aware of when it comes to the interaction with the rest of the image generation; or would it just be safer to take the approach of having separate images? (That wouldn't be so usable, since it'll only be u-boot that's different between the two - I'd prefer to get both generated from a single bitbake)