That's because the second one isn't actually a G - it's F/A-18F CUM number one, with most of the G gear hanging off it for preliminary aero evaluation and flight test. The tip pods replace the LAU-127s and there are no provisions on the outer sides of the pods.
An EA-18G has no provisions for AIM-9 on the wing tips, as seen in the pics in the first link. Those are pictures of EA number one,which is also actually a F brought up to the full LRIP hardware standard.