Priori has 3 sub main brands:
Coffeeberry
Aha
Idebenone
You can use which one you like to suit your business, though they will likely try to get you to take on all 3
They also have their new Vitage range which gives great results too.
Md is fab and gives great results, however there is debate to wether glycolic causes too much irritation in the deeper levels as the molecules are so small the pass the langerhan cells too quickly and potentially cause irritation this way, however I've never known anyone to say md results are rubbish!
I feel personally that Priori is a bit more contemporary and cutting edge in its formulations than md.
You need to experience treatments from both and see the results as part of your decision!