2nd grow - interesting how different the strands grow

Title states- this is my second grow. This is Peanut Butter Cake - it's so much taller than my White Widow was at the current stage. The Widow was short and dense where this strand seems to be much taller already with more spaced-out nodes. In these pics I think the Widow was a week or a week and a half ahead.

Strain?

I mean strain not strand

Not only strains, but sometimes (often) phenotypes within a strain are different from each other.