I wrote the pull request that is now being called a9lh v2. There shouldn't be any user facing changes. Aurora's installer can now install using 8.1 firm. Tbh, the v1 vs v2 distinction is dumb, since it is pretty much the same codebase, just a different key and load position. I had another pull request be accepted recently that was a more invasive update. Shouldn't have any user facing differences.
Tl;dr, no reason to change a9lh install