From the looks of it, I would wait, but you can't really tell just by appearance for sure. You should check with a microscope to see which trichomes you can spot. But if you don't have one handy, I would recommend waiting about 1-2 weeks longer than what the manufacturer states for the flowering time on average, and I would definitely wait until they mature a bit so that at least 40-70% of the hairs are brown. If there are still a lot of white hairs, then they're not done yet.