I've noticed a difference between this press release and the first press release for the first set that mentioned what features were to be included. The press release for the first one actually mentioned a few bonus sketches that were going to be included, but this one doesn't mention any specific sketches (I think it does mention Pinball Number Count, but the sketch for #2 is in two of the featured episodes, and I'd be surprised if another one was included as a bonus feature on the same set).
The press release for the first one mentioned some of the features that would be on there, saying that it has "songs that parents will remember, including Rubber Duckie, I Love Trash, and C is for Cookie" and "cartoons that parents will remember, including Ladybug Picnic, King of 8, Alligator King, and Pinball Number Count" (the last one, of course, wasn't included).