Let's change this to 2 PCs. Just like a PC we need to know what these 2 things are going to talk about or share.
Some things like sending Bluetooth Audio from one to another is not implemented.
My Samsung Tab 3 - 8" tablet is over 2 yrs old but my Galaxy S5 phone is only 7 months old. How can I get them to recognize each other?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic