Genetics has everything to do with how certain bud smells. From what I've researched, more indica based strains tend to be more smelly while the satva based strains have a more subtle odor (I'm going to go ahead and say one of my references was either from The Cannabis Grower's Bible, the Cannabis Breeder's Bible or on this website in another forum). For a while I always assumed the more potent smelling bud was the best bud, but we've tested (and researched!) that out to be more so a rumor than anything.
I have smoked some pretty dank bud that didn't smell that strong at all. Fuck, one of the best buds I've ever smoked both visually (high trichome count) and mentally/physically (smoking it) was Purple Queen, and it didn't even smell anything like traditional weed. It was kind of flowery, actually. Did it still get you fucked up? Well, yeah.
Like someone else said, just smoke it. That's really the only way you can truly tell if it's good bud or not.