Yes, they were twins, and they were called "Fraternal" twins.

Edgar was the older of the two, because two children can't be born at exactly the same time. One must come first. Edgar may have been 10 minutes older than Sabin, or something like that.

Two types of twins, Identical and Fraternal. Fraternal, like Fraternity, because the two just kinda "hang out" in the womb, but they're not the same thing, and I think they even have two seperate placentas.

Therefore, Sabin may have looked like his dad and Edgar, not so much.

Feion