That's one more draw, one more Energy from the Energy Zone, one more Ability use, and one more attack you can land on your opponent
Arcane Encyclopedia, while not a direct comparison, still beats out the Intelligence Bobblehead in terms of value
Mana Vault can easily be exploited to tap for large amounts of mana, and that's worth taking some damage in the process
Furthermore, Satoru lets its player benefit from all ninjutsu uses by letting the,m take a card from the top three cards of their deck while putting the other two back at the bottom
Theres also the 10 poison counters win condition, which started as an alternative win condition but can be considered a third way to win based on how much poison there is in competitive Magic