This is the way they mature, the tops are always a bit ahead some growers like to harvest the top buds first and give the lower flowers more time to mature. From what I see on the pictures I would go for at least 14 more days. Leaves look like they just started to fade a couple of days ago. But also depends on your preferences when it comes to the end product. More amber (when THC degrades to cbn) leads to more of a couch lock body high, less amber more milky trichomes to more of a head buzz