The real hotness is going on in the former: the T30 packs a 3-inch touchscreen LCD, 3x zoom and 7.1 megapixel CCD, along with face recognition for beefing up auto focus and auto exposure, high ISO digital shake reduction and some stylus-based frivolities.
While I usually prefer Manual modes, I have no qualms about setting the X-E1 to Auto mode, including the ISO (up to 6400, though quality remains impressive at even higher ISOs).