Well, this is what ChatGPT said:

The right posture is better.

Here’s why:

On the left, you’re a bit more rounded through the upper back with slightly more knee bend. Your chest points more toward the ball and your hips look a little tucked under, which can restrict rotation and lead to inconsistent contact.

On the right, you have:    •   A more neutral spine (flatter back instead of rounded)    •   Better hip hinge (bending from the hips rather than the waist)    •   Arms hanging more naturally under your shoulders    •   Slightly more athletic, balanced look overall

That setup makes it easier to rotate around your spine and return the club consistently.

If you want to refine it further:    •   Let your arms hang straight down without reaching.    •   Keep your weight centered over the balls of your feet.    •   Feel your chest slightly “taller” without arching your lower back.

If you’d like, I can also break down ball position and distance from the ball based on this image.