If I am not mistaken, Studio Pro W is just the white version of normal Studio. In that case, you probably won't find the same level of detail retrieval as Studio does better in bass than in treble. HiSound Living might be more up to your taste. B&O A8, which is a clip-on, might be even closer. However, from what I have heard it is using a different driver now, warmer and less airy. Still I would think it is a closer approximation than CM707. Creative Aurvana Air (also clip-on) is another good alternative as well.
Are you using foamies with the CM707?