Could Be A Spoiler

No the Alpha probably bit his sister 2 . I think they looked different cause Derek's older & Scott's like a perrito, cachorro compared to him . & Scott can feel Derek when hes around - i think that means there in the same pack .

No, I think they have diffrent color eyes just because it's a generic thing??????

NOOOOO... WELL THATS IT PERIOD... SCOTT WAS BITTEN por THE ALPHA WHICH MAKE HIM PART OF THE ALPHA'S PACCK... WHILE DEREK BECAME A lobo FROM FAMILY HERITAGE SO DIFFERENT PACKS.. PLUS I THINK IT'S BECAUSE THEY R PRETTY... AND tu CAN TELL WHO'S WHO AS A PURE WEREWOLF... (DEREK-BLUE SCOTT-GOLD ALPHA-RED)