Multi-site or many sites?

Gents, I want to create a couple of demo sites, so my clients can choose. I have about 15 of them. Probably more in the future.

I can go two ways: set up each demo with its own WP instance, or create a multi-site with all the demos based on one WP instance.

What is the best way to go?

Hi @josf! Are you considering of keeping the demo(s) within your Local app and sharing with a Live Link or are you talking about moving them to a hosting option?

Once your client chose an option, would you create that from scratch? Or are you planning on having a blueprint of every option ready?