It appears as if one is a sativa, and one is a hybrid. That might possibly be AK47.

Its too early to harvest, your hybrid is no where near flushing yet, and still has several more weeks to go, I would honestly wait another week or so and get some molasses in there right now, as well as some super bloom, tiger bloom, or anything like that to help those buds densen up and thicken up real fast.

The AK looking one would have benefited from some topping, however, give her another 3 or 4 solid feedings to help those buds out, and as soon as all those trichs on her are cloudy, flush, 3 days of complete darkness (closet or cabinet somewhere) and then harvest.

The 3 days of complete darkness will help your overall yield, the plant takes the sugar from the molasses, and crystallizes the buds trying to preserve the plant for as long as possible, giving you a nice frosty finish!