Iwasaki vs Geismann 13.5K? Which has more PAR, Less Blue?

[jefft321]

I want to replace my MH lights and I have a 2 x250watt MH fixture w/ 4 T5's. I am deciding between The Geismann 12.5K, 14.5 K and Iwasaki 14K, has anyone used both of these bulbs? Which has more PAR, which is less Blue?
I tried XM 10K's, but I think they are too Yellow?