The crystals (a) weren't deliberately dispersed into the jetstream with hundreds of multi-megaton explosions, and (b) are not radioactive or otherwise capable of affecting unrelated substances from a distance.
Other than that, yeah, I guess it's exactly the same.
Isn't crystal nucleation exactly the kind of process that _is_ affected by impossibly small impurities? One good conference could spread crystal residue over a whole industry.
Other than that, yeah, I guess it's exactly the same.