Several months late reply. After reading through the profiles, I might vote Beast for this one. I'll explain why while also responding to Arkan's arguments.
The first thing I'd like to point out is that Beast upscales from all of Gaston's feats to the point where he can
easily overpower the latter and
stop attacks from him when serious. Gaston only managed to harm Beast twice, both times by
catching him off guard while he wasn't willing to fight. This means that the Wolf is outclassed in terms of AP and will struggle to inflict damage on the Beast, at least while it's still alone.
Other than ramming through stuff, the Wolf doesn't have any notable LS feats during its 3 minutes and 11 seconds of existence, so its Superhuman LS is kind of questionable. Either way, Gaston should be superior to it out of sheer feat quantity, which would put Beast even further up in terms of LS (I have a few more issues with the Wolf's profile such as how the calculation for its AP seems to assume that what it broke through was a solid stone wall instead of what's clearly an open doorway, but I digress).
Beast is def gonna give Wolf a run for his money. Hell, Beast has faced against wolves before.
However.. the wolves Beast faced were eurpoean wolves (I'll just use
this profile for simplicity's sake), not Siames.
Beast can handle a pack of 10-A wolves, but not a pack of Siames, who's 9-B.
I heavily doubt those wolves he faced are just regular 10-A wolves since they managed to
inflict many deep wounds on him to the point where he passed out after the fight and had to
have Belle tend to his injuries. Beast was also clearly holding back against them since all he did was throw them around and roar at them to scare them away. He has sharp claws and teeth, so he could have torn them apart if he wanted to, but he didn't. He let all of the wolves run away. The only other foe who can hurt him to this degree is Gaston, and Beast beats him easily when he's actually trying, as I pointed out above. So, Beast is either ridiculously weak to piercing damage for some reason, or he's only getting harmed a lot when holding back, which he has no reason to do against the Wolf. This one is a supernatural shapeshifting shadow monster, unlike the ones he spared, so I doubt he'll treat it like an animal just trying to survive.
When Siames wants to split himself into dozens of wolves like a shadow-clone justu, Beast would be one big furry tasty meal.
Voting Siames, mid diff.
I feel like "dozens" is an overstatement.
Counting the number of wolves that show up in the video, there are only about 13 of them (including those two that were going after the two other people). There could have been more of them at the end, but it wasn't made clear how many there were, since most of them were shrouded in shadow, so we can only use the number that actually appeared which isn't much more than the number of wolves that gave Beast trouble. With Beast
showcasing decent battle IQ during his fight with Gaston and taking the arena into account, he should be smart enough to just grab and toss them into the void (assuming he doesn't immediately do that to the Wolf while it's still alone).