I don't want to go too much off topic here, but all this talk of OES and BiA, does anyone else prefer OES over BiA? I do...
I think there are two factors to consider here: which one you consider to be the better song and which one you would prefer to hear live. They are not necessarily the same. For instance, I think TR is a (slighly) better song that TOL. But I would choose TOL over TR any time, because I've heard TR many times and I never got a chance to hear TOL live !
I've heard both BIA and OES in the past, and I think BIA is a more Mighty song than OES. Nonetheless I would prefer to hear OES, because it has never been played since the DS days and that would be quite an event !