do you know what strains these are? that helps alot... Could just be a auto flower due to light changes or genetics etc... But you can tell they look diffrent so thats my guess "strain related issue". Tricoms starting to bend or deform? using 30x mag scope to look?
watch for them to start turning amber this means shes starting to die and this is when i like to harvest.. when they have a hue of brown and have a small bend in the tricoms. Some like it other ways.. I find it to be nice and potent this way.