Okay in order to show you (well anyone who is actually still is being honest with themselves) that they are in completely differently breathing cycles lets first see what we can tell from a dragon who 100% is in a different cycle.
In this picture:
1: You clearly see the inhale his chin is up, during the exhale (bottom picture) his chin is down
2: You clearly see his wings spread further out during inhale so you see less of the background than in the bottom. You can't see the lanturn
3: Shoulders look smaller because of this because during exhale his body is obviously contracted.
Now that we established this lets go to your picture
1: White dragons chin is clearly down, you can even see his chin line overlap his neck. Green dragon is straight up. This alone proves they are in two different cycles
2's: The arrows labeled as two you can clearly see the you can see more background because his wings are contracted. In the white image specifically you can see both eyes of the lion poster behind. In the green the left eye is clearly 100% covered.
Purple arrows: Compared the arrows on the dips of the dragons wings. The white once clearly are wayyy closer to his body. The middle ligament is directly behind the hand on the white dragon while on the green dragon the middle ligament is way further away.
This is all to show you that you are clearly full of it. Anyone who actually watches the video and has even a hint of something they call a brain can tell that the white one is in a complete exhale while the green one is puffed up in an inhale making him appear to be bigger.