HI blue and HI yellow are exactly the same thing, Oakley just renamed the lens from blue -> yellow.
HI persimmon and regular persimmon are different from HI blue/yellow and different from themselves. I find HI blue/yellow the absolute best for flat/low light, however HI persimmon to be a better overall lense (not blinding in sunlight).
and to those who may argue with me, HI persimmon may look blue, but is an orange lense with a blue-ish coating, and HI blue/yellow is a yellow lense with a blue-ish coating, which is where the confusion may arise.