It's not just you! I thought the very same thing as I looked at the first page. In fact, a few panels make me wonder if Bill Everett might have done a small art assist. (That would explain the higher quality of the artwork.) Since this was a Centaur feature, and they worked together even then, I'm seriously wondering if such was the case. Do you think it's possible?
Definitely possible. One can see at the very least a clear and obvious Everertt influence. Look at that last panel!
Yep, it's that last page that made me wonder (the panel you mention and the underwater sequence, of course,haha), so I re-read the whole thing and became even more certain.
Four tiers and a row of miscellaneous header panels!
This is an unusual one alright! Those tall pages! I think you have indeed pointed out a story that both Burgos and Everett worked on...It is often so subtle to detect but here is one where they are both visible.