The H3 probably has more depth and layers better, which makes it sound more precise in imaging. Width though, the EX1000 runs away with by a country mile IMO. The EX1000 makes the H3 sound dark and closed in, while the H3 makes the EX1000 sound a bit flat and harsh in the treble. Timbre to my ears goes easily to the EX1000, as does clarity. But like I said before, the H3 has a tonality that is so evenly off across the entire frequency response that it's easy to get accustomed to it. The H3 has more detail in the mids and treble, but doesn't have as much of a range as the EX1000 in terms of being able to sound smooth and change to crisp.
Mids are a bit too recessed for my taste on the H3 for the most part.
Both are great for what they are. I like the EX1000 better for it's timbre, clarity, and dynamic ability to adapt to the music.