There is definitely a big difference over his behavior and the girls, though I have not actively watched him eat or drink yet. Maybe this weekend I'll try hand feeding and observe him when the mist king goes off.
He's way more active though, and always seems to be in a different spot each time I see him, changes his colors often from over-ripe banana to green depending on his position, and seems to have pretty thoroughly explored his enclosure, mainly the left side (the side with the basking light)
The girls were more prone to clinging to the top screen and otherwise sitting still