I have a P4 FL and its good but the MSR has more tools in the reticle. Doing it over between the two I would choose the MSR. But doing it over for real I would get the H59 or Tremor 3. I really like the floating dot in a lot of the new reticles.
Personally have the Gen II XR and the H2CMR. Love both, but gotta give the edge to the H2CMR. Guess that’s not your question, but I think it’s just going to depend on who’s looking to buy when you’re looking to sell.
I have older eyes......and for me the MSR works best......I pick up the reticule quick (even on lower power) and does not bother me at longer ranges. I always wanted a SB or Premier, and the SB does not disappoint.....really like this optic. My shooting partner has a Premier with the XR2 reticule.......and it is too fine for me.