I am not sure if you mean “flown either black jet” or either T-38...no to the former, yes to the latter. I stated things the way I did because I find it amusing whenever A models show up on the ramp, they look brand new. In my head I conjure up a scenario where people who would be fixing things that are C-specific now spend their days on the line with a wash bucket and wax rag keeping em shiny.
This wasn’t a knock on the people who use the A model, but when you compare A to C for UPT (THE primary function for the trainer) there is no question which is undeniably better for the intended use.