I have been trying to go buy the colour of the trichomes as I am a noob and I thought it was the easiest way. For the same reason I can't answer the question about the high, I haven't read anywhere where the triches go directly to amber.
I saw the Happy Plumber post of yours and it was fantastic and could see the difference between the bud in the pics you posted. Unfortunately through lack of knowledge again I had to take my plant before time (bad weather) but I still reckon it would have been difficult to tell by the look of the plant, I think that ability will come with experience and I am looking forward to that day.