Having 2 credentials in mobile is hard to load automatically as we do not know what to use.
Best outcome is for users to select which variant should be used for the app they going to use it.
As alternative we could have 2 variants in the mobile-config.json but this kinda defeats the purpose of the automatic config as users will need to choose
in code which variant they going to use. That means that they would probably be better than copying this variants themselves rather than use mobile-config.

IMHO single variant in config is the way to go.