Is there a major difference??
Aren’t some of these kits instead of full blown classes? I seem to remember some of those from the Complete Books of Whatever.
Where is the Jester?
He is probably talking about the AD&D 1e bard.
There's no difference. They changed the mechanics of the base class (minor) and became their own class.
Go ahead, mess with a 1e Bard.....
In our groups every time a player attempted to become an AD&D 1e Bard the campaign fizzled before he actually achieved the first level of Bard. The requirements were too high in my opinion. Taste vary.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.