Are the two starters for Pokémon Colosseum always exactly the same at start?
Solution 1:
Umbreon is Lv. 26 and Espeon is Level 25. Espeon is stronger overall, while Umbreon has more health and defenses, but weaker offensive stats. They also start out with different attacks as well.
In order to prevent breeding either of these two, Espeon and Umbreon will always be male. Their IVs and Nature, however, will be random.