It will pass, because Latias is more over a threat. It has a better movepool, and it has higher SpD than SpA then Latios. Latios does have higher SpA, but he can't even sweep thanks to his Spe.
Yep yep! Latios is now going through the test now! Latias makes a great Wish Passer, BTW! Just because of Soul Dew (times Latios and Latias's SpA and SpD by 1.5).