Yep the 30 Cal round is best suited for 180s some swear by 200s and some by 165s, but ballistics dont lie, 180s are best suited for hunting anyway if its accurate!, as for the 338 it likes 225s and 250s.
I shoot ( which means little ) 250s i n my 338 and find i get better accuracy thats why i went that route!
But if you mean more energy, the 338s got it if you need it! I have not looked it up for some time but i would guess there an extra 700-1000 foot pounds or so at muzzle available with the 338. But thats a guess
But as Gatehouse suggested call and ace an ace, we live in North America!! But its fine to have both lol !! or shoot what you want with what caliber you wish!