Albinoni
Banned
I have both the Fenix P2D and the Nitecore EX10. The P2D-R100 has a flawless beam. It is an awesome light with 2 exceptions... The low is not low at all. It totally ruins your night vision. The light has no knurling but certainly not a show stopper.
The EX10 is very nice also, but not a huge CREE fan due to the ringy beam. The low is very low and perfect in my mind. The ramping is great at any light level in between. Only down side to the EX10 is the piston is very stiff to push, and the CREE in my opinion.
If I had to choose only one, the EX10 would be my choice do to the knurling and low low.
Bud
I am assuming your P2D is using a Luxeon Rebel LED if I'm right.
Now re the circles on the Cree I've heard this problem can be overcomed by an OP reflector if this is true.