"The difference between Glass and Yared, though, is that Yared seems better equipped to convey the simple emotions of the passionate side of the story without being inclined to experiment with classically complex ideas."
I'm not entirely convinced that Philip Glass experiments with classically complex ideas. In fact, I'd go so far as to say that experimenting with classically complex ideas is exactly what Philip Glass doesn't do. Sure, he did that additive rhythm thing for a bit, but all that his music seems to be about now is minor thirds rocking back and forth.
...oh, and scales too.
I haven't heard the score for 'Sylvia' yet, but I like Yared and after listening to a sizeable portion of both composers' work, I certainly find his music to be more interesting than Glass'. However, I'm not saying that Glass' music is complete - the score for 'The Hours' worked a treat in the film - but like I say, I don't associate "classically complex ideas" with him. I'd be much more inclined to pin that tag on someone like Goldenthal (possibly even on Yared, or at least on Yared when compared to Glass).