Shingeki no Kyojin 35:
Funny that the most beast like Titan is the first one to speak. This new Titan just creates even more questions though. Besides his intelligence, looks, and ability to order the other Titans around, from the questions he asked in this chapter we know that not only is he not human/can't turn into one, but he can't even be affiliated with the group that Annie is in since he would have been able to learn about the human's technology through them. And considering he wanted to take the weapon back with him, he must be working with other Titans. So now we have a second "group" behind the scenes and more questions about where the Titans are coming from.
I think we're safe with thinking that the second hole was not related to the first hole. As in, the first hole was created by a different group than the one that caused the second.
That is, if there really are different alliances within the Titan side. For all we know the hairy side are the "majority", while Annie's group are a tiny rebel group who are doing their own thing. And then there's than entire notebook nonsense, where the dude prayed to the human.
The thing is that the hairy guy wasn't even interested in eating the human. Hell, we still haven't seen an intelligent Titan who was interested in eating humans. And also, all the titans understood him completely, so they understood human language. They might even be tricked into a certain groupthink if the humans manage to broadcast an edit on his voice.
And last, it's not really that confusing that he isn't a human/can't turn into a human. All titans we've seen so far except for Annie and Eren are like that.. so basically, Annie and Eren are the "exceptions", not the other way around. It normally isn't possible for humans to switch to titans or the other way around, intelligent or not. Makes sense.. you can't expect every single titan to be a human who was injected the thing Eren was (and I assume Annie too).
He did talk about the back of his neck, but I doubt he has a human there. I think it'll be more like a brain or core nerve organ there, or any other subversion of a human. In the case that he really does have a normal human there, I doubt it could just be separated from him, he's probably completely combined with the Titan muscles.