Jacob has a wayy better body for many reasons. First of all, he is a warewolf. もっと見る nature-y and it's not like he'll be wearing long sleeves and totally covering himself off. He just has better abs cuz he needs them and uses them. AND it shows how buff he is even tho he's younger. BTW: edward doesn't have abs at all.....people just think that he does cuz he took off his シャツ to reveal himself but he does not have abs...like...at all!