Ganon holds a bow straight while Link holds it at an angle.
Ganon also draws the bow like a samurai, (since this Ganon is more samurai like) he positions/aim the bow then draws.
(Not shown here) Even if Link uses a long bow like Ganon he will still aim at an angle since he is a soldier. He positions/aim the bow and draws at the same time.
The bow Ganon uses will recoil meaning this is a heavy bow. (They didnt need to add that detail in, but they did man)
Imagine you're several millennia years old and learning that the Legendary Sword That Seals The Darkness not only breaks like a toothpick but is also wielded by a twink