Surprised that no one has mentioned bud maturity..One time, One of my beginner grows, I pulled my Purple Widow too early.. Longer the buds are left to ripen,..then less hairs (not always, but most of the time)..Purple (indoor 400 hps), got pulled 2 weeks to early..Pistils had not receded back into the bud yet,..once dried, and cured,..Looked like it was covered in "pewbs aka pubes"..Was cool at first, purple bud, green sugar leaves, and red hairs..Didn't take long to start becoming a nuisance . or maybe just the thought of it.. The last week/week and a half, etc.. is the most critical.. Your bud pics looked like mine, with the most red hairs bud being a certain maturity, and the less hairy bud being harvested about a week or 2 later than the hairy one..So in a sense less hairs "could" hypothetically mean better pot with higher THC. Just one of many possible scenarios.. Just my 2 cents..
Hum, interesting scenario. The trichs are mature under the scope, and I went 8 weeks and about 3 days. But you bring up an interesting point to consider I will try that with one next time vs. the rest of the batch and see how that compares.