The best multi-function of the two is the Sabre. It can carry both rockets and some heavy bombs while the MiG only has 2 100kg bombs.
Both have clickable cockpits, they both have EFM if that is what you ask, but Belsimtek is still tweaking them since they mentioned them in the 1.5 patchnotes.
There are some premade missions for both of them though its not much. There is no campaign.
Sadly multiplayer scene is pretty empty. I pretty much never see a Korea server with more then half a dozen people. Sabre vs MiG dogfights are probably the most intense in the game when you get in one. (And even more sadly, the timing of the MiG vs Sabre contest couldn't of been at a worst time for me :( )