[roberte3]

I'd worry more about the general topics that your learning, rather than the technology that your using to learn it.

Are you in a Computer Science class or a bogus how to use technology X class.

Are you learning Discrete Math, Big O, how to write a compiler, assembly language (doesn't really matter what platform).

If your learning CS, then you will have the tools you need to tackle any job using whatever tools you have at hand.

The "huge" differences between JSON and XML, don't really matter, if you can write a parser...