Yes. It was more firmly established in the novel about how powerful Wilhelmina was (most think she's just some Flame Haze, but she is one of the strongest and oldest alive) and how powerful Sabrac was to totally beat her down everytime they fought. Also emphasized how strong Pheles was, and how insightful/intelligent Yuuji is.
Basically the anime gave a bare bones depiction. The novel's characterizations are going to be inevitably superior.