At this point in time, Chad Valley pretty much had broken ties with Kenner. While their projector still looked like the standard Give-A-Show Projector, they had altered it. The slides now came with two stories, with each frame using a "wide screen" format so that they could fit pictures from two stories on each. This is why the stories have an "a" or "b" with the numbers. It actually made the Sliderama (as they now called it) a much better deal than the Give-A-Show, because they offered twice as many stories per set!
As you'll see as we continue to go through the 1970s, there was little duplication in licenses between Chad Valley and Kenner. You've already seen that Chad Valley had the Disney license (there'll be a few more Disney sets coming up, including a Robin Hood set based on that movie), and there'll be the Planet of the Apes set coming up based on the TV show!
The only duplication of licenses in the 1970s were the Six Million Dollar Man and Bionic Woman (as you saw during "Bionic Month") and Star Wars -- and the two companies did not share materials at all for those!