The Ori is a tad thicker than the Brommie, but has more off the shelf components and is more amenable to less costly modifications. That being said, I love IGHs for commuting (the benefits outweigh the weight disadvantage). I don’t see the gain for the triathlon scenario, but that is strictly me.

For what’s it worth, my wife is a captain and she tried the Brommie overhead route, She stopped the experiment after 3 weeks. There were too many variables involved from no overhead space (and no closet space) left to getting stink eye when non-reving on a sister airline, as well as others.