The new single will be released in three types: all will feature the two title tracks, plus a different third bonus track. The first two types will further feature a PV for one of the title tracks.
As for their two looks: IMO it's their best AND worst look yet! The colorful look seems to be for the CINEMA /Syndrome/ side, and it's super cool. The HEARTS look is rather plain, and too “let's go major” -smelling to me, but at least they wear it well ;).
By the way, you might notice that CINEMA /Syndrome/ was a bonus track on their full album from this year. Sort of audacious to re-release it as part of a double-A-side single IMO... but it's a really good song, and I guess they just want to support it more :D.