Both are
currently great. Depending on your age no one will be able to give you any valid long term career advice - too much potential change.
Keep in mind - I believe FDX has capped its DB at 130K and that will not increase over time so it will gradually be whittled away by inflation - especially for today's new hires.
Can any FDX guys verify this?
Currently I would say overall FDX has the premier Pilot contract in aviation. DAL is currently in negotiations and hopefully we can improve our contract over the sub-standard TA that we just voted down. Like someone said if you can fly out of NYC DAL offers very rapid upgrades.
Good luck either way!
Scoop