Ok #plantID folks, is this #horseweed, tarragon, or something else? Apparently horseweed kind of tastes like tarragon, so even if I were willing to eat it, that may not help. https://foragingguru.com/erigeron-canadensis/ PlantNet isn't giving me a probability over 50% for either, but I'm leaning towards horseweed since it's growing in a crack in the sidewalk. iNaturalist seems to favor horseweed.

Web searches yield no results for distinguishing the two plants. Am I the only idiot who can't tell the difference?