I don't know Lagunitas extra. But since everybody has said left (even though it looks like it's the HB) i'd say right, especially if it's from bottles, and not force carbed in keg.
In the left I see only round "debris"/ bubbles. In the right i see some flat ones, which can't be gas, my guess is that I'm beeing fooled, or the flat ones are grain/hop matter. The head on the right seems less dense, hence my thought on this being from HB-bottle. A pic taken slightly more to the left would have put both beers aligned more evenly towards the sun.