I don't understand the question. It sounds like you want to connect an apex classic to a 2016 apex. If so, what for?
Or maybe you had your apex 2016 go bad and want to place an apex classic in its place.
There's really no "better" or "worse". If you just want to use a cheap older model Apex for the mixing station, you can do that. But in Fusion you will need to toggle between your main Apex and your mixing station Apex. They cannot be displayed on the same dashboard at the same time.
If you choose to just add remote modules with your main Apex, then everything would be on a single dashboard in Fusion.
Thank you, that makes total sense. Getting the hang of my Apex!
If you're new to the Apex, be sure to read my Apex programming tutorial articles: https://www.reef2reef.com/ams/authors/suncrestreef.93940/