public static float GetAngleDiff(Quaternion a, Quaternion b) { var va = a * Vector3.up; var vb = b * Vector3.up; var angleA = Mathf.Atan2(va.x, va.z) * Mathf.Rad2Deg; var angleB = Mathf.Atan2(vb.x, vb.z) * Mathf.Rad2Deg; var diff = Mathf.DeltaAngle(angleA, angleB); return diff; }