Just to throw this out there - I've actually found the best concentrates to be in batters/butters & saucier consistencies. They can be more of a pain to deal with if they're too saucy but in general the best flavors tend to follow this rule. For me, shatter and crumble are a pain in the ass to work with (for a few reasons) and rarely have much flavor by comparison.

Also on the topic of chaz - I've never experienced more chaz between any of the consistencies, only between higher and lower quality dabs. But I also dab fairly low temp so maybe that's why? The only exception I've found to that is cheap rosin - I'm guessing because the process of pressing lower grade hash leaves behind more actual plant material, lipids, etc.