As far as I'm concerned, both "resinous" and "dank" are broad terms that convey a sense of weight. I would expect thicker, heavier flavors from a beer described this way. Almost viscous.
I had Resin last weekend (albeit at the end of a long session so my recollections are not necessarily crystal clear) and it was a sippin' beer, not one you would quaff. Heavier, viscous.
While there may be ambiguity on the specific flavors you might expect to taste, I think both are more broad descriptors of the overall impression of the beer. I wouldn't expect a light, bright, fruity beer if someone said it was resinous.
Also, a fruity beer could be grapefruit, lemon, etc. Fruity being the broad descriptor of a whole range of flavors.