No two bodies are the same, so no two postures will ever be the same.
Adam is stronger in his legs and hips, so his Triangle pose is more aligned and he can get his leg to look like an “L”.
Eva’s spine is more open, so in Separate Leg Head to Knee, there is more rounding in the spine.
Neither posture is “better”, each is getting what their body needs. The postures don’t change, you do.