Really no comparison at all.  Crux Pearl has a more aggressive coverstock and much more aggressive core.  Now, the Crux Pearl doesn't hook as much as I expected it to, which I think is a good thing.  It's more versatile and usable on many conditions, and it's pretty smooth and controllable for a strong pearl with that strong of a core.  It's a house shot killer for me.  Expect it to be earlier, smoother, and hook several boards more than the HRP.