I am a bit confused onto how the PP scores compare to the GMP scores.
Obviously Q is harder on GMP but on the other hand scoring is more lenient as well. For example I got 5 wrong on PP Q and got 49. On GMP Q, 5 wrong can get you a 50 or even 51 if you are lucky.
I don't know how the verbals compare but it might be a similar situation. I only got 4 wrong on PP1 V and that was a mere 44, and I rarely get over 41 on GMP V. I also felt the SC and RC was easier than GMP despite the fact that the RC passages were much longer.