The only thing they have in common is their age. As much as I like Juice, he was clearly struggling on the decline last year.
Burr is still a good player who can play on any line and do well. He has amazing hockey sense and is very good offensively and defensively. He is most likely a very good guy in the locker room as well. He has massive experience and can show the youngin's what it takes for a no-name, non-drafted plug to become a solid NHL player.
Regardless, the best time to look at trading him will be at the trade deadline next season ('16/17), as he will only have one year left on his contract. At the moment, the team has no replacement for him; certainly not in their prospect pool.
Going forward, Burr's cap hit is not an issue, so I don't see trading him until there's a prospect good enough to take his job.