It doesn't sound similar... it may to people who don't listen to a lot of electropop, but it's not the same as any of the past singles. The only similarity is what esm said above.
This single has the two things I've been clamoring for since 123 hit - better line distribution and a lower register (And Haruna having a major solo line ). Since Tsunku is listening to me now (:P) I really hope this song does well ><
I'm gonna give some props to Riho here, though she didn't have as many lines as she usually gets, you can still tell she's the ace by her attitude and confidence. Which is good I think, we don't need her to sing 80% of the song to know she's the ace, she just showed us in this video. Bitch was fabulous.
Also notice how all the girls sound amazing in the lower register. Yeah it's like night and day from Help Me!