When im playing a fox, generally the low surface of the stage is very important.
As soon as fox starts shining, DI and a well placed roll are basically the only means of escape
So, it seems like most of the discussion has been about recovery
the point of link v fox, is that fox doesnt recover, if he can, then you have bigger issues than stage
The strange surface of jungle will influence how link escapes shines as well as how fox can shine
So basically, whichever player is more used to the stage will have the advantage low
Fox can got up on the outside platforms, but they are much higher than the 3 platform deal
the offensive options arent quite as good from the high platforms so i would guess that most foxes cant use them particularly well (other than for stall)
the moving platforms are great for link (edge cancel, platform drop nair/uair, and bombs make this area dangerous for most characters) but your link has to be very tight and used to those platforms
from all of this, i think the interior of the stage slightly benefits a fox who is used to the stage
i personally love using the low platforms of triform stages for combos into fair/nair
i would much rather play brinstar, and maybe cruise (im not sure how well fox could run around, and that low ceiling area could be bad, lots of open ground to kill fox tho)
finally, the loss of the hookshot is just too much against fox, there is a point slightly before links up-b where he is very vulnerable, this point is also a great spot to airdodge into hookshot
without that extra option, i just dont feel capable of recovering