The Neanderthals had larger craniums than modern humans, but you can't see that from looking at J-l compared to M-N. The modern humans look larger. Which raises the question of whether the skulls are presented to scale or have been sized to fit.
Also skull F (1470) was reconstructed from a skull that had been smashed into over 100 pieces. It was originally constructed to appear flat face but after a Creationist scientists examined it, and similarities to Australopithecus were identified, it was reconstructed having a sloping face and determined to be a large brained Australopithecus.
Skulls C&D also look to be particularly poor specimens.
Have you seen how they stretch science to try to support the global flood?