Wow. I have two legal versions. One is black and soft and sticky as glue and the other is yellow'ishy and flaky like a pie crust. I prefer the yellow it tastes more interesting and is easier to handle and ignite. I am presently paying ~$25 for 2 grams for either one @ 40%THC to 50% THC. Frankly I don't notice much difference between the two in matters of how relaxed I become. My major concern is smoke-ability; how easy it is to smoke without coughing. The yellow one is easier to smoke.
A friend gave me a few flakes of his gray market hashish for my pipe and it was glorious. Easy to smoke and had a buzz from 4 hoots. I suspect that was a good batch and rare too.