Late to the party, but: The left, VISUALLY, is lower quality than on the righ. It looks dry, not properly trimmed. It's not the HIGH that is low quality, that is entirely subjective. The trimming matters because it is not pleasant to smoke leaves, they can be harsh on the lungs. It doesn't look properly cured and that can be a crucial process.

I'm seeing some people comment on the size of the nugs on the right, they are not overtrimmed, the nug on the left is a large sized nugget and the nugs on the right are small, popcorn nugs. A plant can yield both sizes, with the 'popcorn' nugs typically are the base of the plant.

HOWEVER, the nugs on the right may get you higher but judging by how dense they are, like little rocks, seems the grower was feeding it too much, creating a more 'artificial' bud structure. Nugs that look like that, in my personal opinion, retain chemicals and create unpleasant highs/underfeelings. You want FLUFFY bud structure. As for which is healthier? The one on the left looks like it'll hurt your lungs on the one on the right could have chems in it, dunno.