^^
Considering Matsukuma Kenta writes most/all of their songs as well as songs for BiS and GANG PARADE, their songs having a similar sound isn't that surprising. Matsukuma and Watanabe were also the main team for "Orchestra".
Haven't decided which day to go to the in-store mini-lives (Thursday/Saturday - Shibuya, Friday - Shinjuku) but at this point, I would probably just go to see them in person (handshake/cheki) since I doubt I'll be able to get close enough to see them on stage.