It depends on the situation. In a fight that requires quick thinking and agility, Spiderman might be more dominant. His ability to move around quickly and avoid attacks gives him an edge. For example, if they were facing a villain with long - range attacks, Spiderman could use his webs to dodge and counter - attack.
Neither would be truly dominant all the time. In a well - written fanfiction, their strengths and weaknesses would be balanced. Spiderman's scientific knowledge might help them in some situations, like when they need to disarm a high - tech weapon. Wolverine's survival instincts could also prove crucial. They would complement each other, and the story would show how they both contribute to their joint efforts rather than one being dominant over the other.