I don't know, The Mugen kit reminds me of the RSX kit. Which I feel looks a little gaudy. I guess if I got one I would get all JDM body work. But I do like how the Modulo kit adds a little change but basically gives it a bigger "mouth" so to say.
But the Mugen is functional, cause it's been wind-tunnel tested so that may prove to send it to the top of the list.