You should generally expect your scores to go up on the real things for both SNS and QR, using these sample programs.
Kaplan's PAT is easier than the actual one but you may treat it as a beginner's guide. Then only let DAT Achiever further prepare you from there.
I found that their RCTs have not been on par with the real test, but DAT Achiever's "Share Investment" passage is worth your closer look at it. I heard it's still in the DAT question bank.
All the best to your DAT then...