i would do as you say m8 with the one that is looking more yellow and leave it longer as for the other one i would definatly keep an eye on it over the next few days as it is getting very very close
looks like about 3 days left to me let me know if im right m8
as for the harvest in dry wieght i have no idea m8 its hard to tell from piccys of a plant that ya havent seen in real life if ya know what i mean
hope this helps m8
cheers all