I just got a pair of genius 6.6 mega that are Speedplay specific. They are 700g including cleats.

My worn-out carbon soled Diadora's they are replacing are 685g with Look Keo cleats.

Right now I like the new shoes but they're new. It's hard to compare to a super broken in pair. Fwiw, I've never needed a wide shoe in my life. With the Sidi's, I had to get the Mega.