For the sake of simplicity: Everything is different unless a rule says otherwise. There is a rule that explicitly states that Hirelings, Mooks, Minions, Allies, Comrades, and Sidekicks are the same. There is a rule that states that Curse, Traps, and Disasters are the same. Same for Steeds and Vehicles. A fair amount of this is covered in
Munchkin 7's
rules. It actually explicitly discusses things that are different, too, just to play it safe.
For certain, that file needs to be updated to discuss Comrades, Allies, and Disasters.