Which booster is better to rebuild?

[Jax_1975_Dart]

I have these two boosters that are worse for wear. I need one for my Dart Sport disc brake conversion. One seems to have some additional hardware and the other a more simplified version. Would either one work? Would one be better than the other? Thanks!

Edit: I plan to send one only to booster Dewey for service repair.

 

[Wvbuzzmaster]

Pull the dust boot off the back of both and verify that the Bakelite tube is not broken. A broken one of those will cost you a core charge. Personally, I would send them both and ask for them to test both for rebuildability and only have one rebuilt. Worst case they have both to make one good one with new innards and saves a potential core charge for unforeseen broken NLA parts.