Da Vinci, Vitruvian Man of Ideal Proportions
Unintentionally there is a disservice in yoga classes. After a student does a pose on one side, that side becomes a standard for the second.
I tell my students that expecting one limb to behave like the one on the other side is like telling your kid he should have gotten an A because his brother got one.
Students are taught as if there is a correct way to do a pose but the way offered is that of a factory made doll. We start with the picture of absolute symmetry because it is neutral but in fact that is only a baseline as we are all built differently. Even the relationship of bone lengths differ person to person. And then most of us have experienced injuries that changed relationships again.
Students notice that one side performs or behaves differently than the other. The awareness is less a problem than the work ethic of expecting the other side to be equivalent.
When you are on the second arm or leg or the second side of a pose, treat it as if it is not the second but the first. You are still using the same guidelines, going in the same direction. But once differences have been established, by clearing the confusion of comparison your first second side will have a chance to shine.
You are cultivating awareness with discernment which is both sophisticated and subtle. It takes patience. This is something that comes with experience. Keep going. The journey is often tedious and even boring at times but the rewards come and they are great.