Freddy is probably just the face they are putting to Small Batch, which was launched in 1988 or thereabouts, when Freddy wasn't even in the picture. Beam's whiskey-making decisions are made in Kentucky, but the marketing decisions are made in Chicago (Deerfield, actually).
Booker's was the original, introduced in 1985, or thereabouts, as a Christmas present for Beam company business associates. It was well enough received that they started to sell it. I remember having my first taste at a bar in Louisville in the fall of 1987. The other three followed soon thereafter. Each is a little different. Booker's is 121 to 127 proof, unfiltered and 6-8 years old. Baker's is 107 proof and 7 years old. Knob Creek is 100 proof and 9 years old. Basil Hayden's is 80 proof and 8 years old.
Booker's, Baker's and Knob Creek are standard Beam mash bill (some disagree with this, but I'm confident I'm right). BH is the Old Grand-Dad mash bill, which has a higher percentage of rye and a consequently lower percentage of corn.
The main gripe against BH is its low proof, which despite its age leaves it tasting pretty blah. They position it as light-bodied, a good bourbon for scotch drinkers.
<A target="_blank" HREF=http://cowdery.home.netcom.com>--Chuck Cowdery</A>