@GrnyGrows they all look fairly healthy. The yellowing you are seeing on the plants heavier into flower is pretty normal. They’re just eating a lot so those ones increase your feed a smidgen and the yellowing on the newer growth will darken up again.
As far as the yellowing on the bottom leaves don’t worry about that. Almost every single cultivar I have ever grown will do that in flower. It’s normal as the plant focuses on flower and top growth.
As far as the different leaves those are just your different genetics at play. They all look healthy for the most part and I don’t see any mutations or signs of pathogens so you’re good there.
It also appears that some are thirstier than others. I’d personally quit watering them all at the same time because the thirsty ones are praying but the others are a tad droopy from over watering. Feel each pot and water on an individual basis. Grows like these teach you quick how to water appropriately because you literally have to learn how and when to water each different plant.
With all this said they look pretty healthy and you’re doing fine for a new grower. Especially with trying so many different ones before even getting one cultivar dialed in.