I guess fantasy is more in the visuals of the comic and romance more in the writing. And I feel that with the visuals of a comic you can judge a lot faster if you like it (the design style of characters, The type of fantasy that is being portrait). Then with a romantic story. You really need to get some time into a story whether you like the type of romance that is being portrait (or if you like the way of writing at all).
So it feels a bit like comparing apples and oranges! But I guess in most fantasy stories the main theme is adventure and exploration and I do prefer those types of stories.