Two potential advisors are interested in me as a master’s student – should I meet with both?
Mostly everyone contacts multiple potential advisors before starting any project (or multiple schools/departments when exploring program options, such as PhDs), and advisors/departments are fully aware of it. You want to be honest, if you are worried, and tell them, when you meet or talk to them, about the ongoing conversation with the other potential advisor. Assure them that you are interested in what they are offering to you, but you want to make sure that, whatever you work on and whoever you work with, it will be a good fit. And, once you decide for one of the projects, contact this advisor to confirm it, and the other advisor (over the phone if this is how you've talked until then, not email) and tell them that you finally decided to work on the other project because it was closer to your interests or any other reason. Don't have anyone on the hook, be clear to everyone as soon as you make a decision so they can take another student.

Overall, be polite and honest, and they will be fine with it.