Yes, diff instructors but the shop offers both
Well, it depends on the shop and on the other instructor.
However... Did you ask the shop about these constraints of gue fundies? What exactly are they thinking about?
Also, if you take fundies, you can taste the gue philosophy. If you like it, you can continue that path easily, if you don't like it, you can continue with other paths. While the opposite is possible, it is usually quite hard.
Last question, does this shop offer advanced training? With which agencies?