So after trying several medium maps with various opponents I'm ready to take the plunge.  Immense Galaxy, abundant habitable planets, abundant stars, Insane Difficulty, slow tech, maximum opponents (9 major, 8 minor), Ultimate opponents.  Only victory conditions are Ascension and Conquest (no tech/alliance/surrenders).

I'm playing a custom race (max eco/research/hp/creative/luck + 15% morale) with Super Breeder and Thalan Tech

After many many restarts I have 2 first turn saves.  One with a homeworld that has a precursor library, and another with a precursor mine for the Hyperion Matrix.  Which should I play?