Despite his image of withdrawn broodiness, Angel's body language is usually quite confident. He stands upright, he looks people in their eyes, he shows his hands, etc.
I agree with you actually, especially in his covers he is usually drawn more head-on, eyes directly at you. I don't think he looks like Spike in body language or in appearance as you do but I do think that he is drawn in a way that we haven't seen for Angel on the covers of the comics. But those are also his titles, he is the main protagonists and in this one, Buffy is running the show. Maybe that has something to do with the way he is drawn or maybe there is more to it. Maybe he's trying to figure out how to introduce Buffy to his split personality girlfriend ... totally possible
Or maybe he is btvs s1 Angel and BTVS s1 Angel is not nearly as confident as the Angel we have now.