The Kaplan books are those 5 red books, yep. I haven't gone through the Kaplan videos, but I suspect those follow their own path.
I haven't read MTB, but my understanding is that it's more of a Step 3 resource. There is a lot of overlap between Step 2 CK and Step 3, and I've read some reviews that say they wish they used MTB for their Step 2 CK. But realistically, it's tough to say which one is better. There's always going to be gaps and mistakes, no matter what resource you use. It's really more of a question of how you actually use them. Kaplan is good for giving yourself a broad familiarization of topics, but might not be so great if you're looking for the high-yield cut-to-the-chase sort of thing.