Imperium x round 2

Week 4 flower!!! So I'm a little confused on these ones. I bought 5 imperium x seeds a while back. These four ladies were cloned from one seed. But they look nothing like my last grow. I'm guessing they are a phenotype leaning towards City of God strain, which is one of the strains used to breed imperium x. It has a very strong orange citrus smell and skunky. So, none of the imperium x seeds I bought turned purple. Just to be clear, it's not a complaint because they've all been amazing. I'm only trying to figure out why such differences from other people. I believe I may have gotten an early batch of seeds. The plants are doing great and growing strong. They smell great. A bit of nute burn, but that's just me trying to push them to their limits.