I'm at a conflict.

The problem with trying to get a better IV is that you are going to need twice the amount of luck, because not only do you have to summon the same hero again, but you also have to be lucky to get a better IV. Unless you have at least 100 more orbs to spare and you really can't survive without a perfect IV, I'd stay away as far as possible from trying to summon again. It's just not worth it..you can't guarantee a better result.

They're both still good XD It's better to try for one's you don't have and let better IV's come along later.

We don't know how many orbs you have, how much you're willing to spend, what demand is in your barracks, what you could potentially fodder, what your goals are in the next few months, what other banners might interest you...
Cmon man, how can you ask us to make your decision for you?

ask your wallet, how much money are you willing to spend?