1. Islam is the only religion that teaches not to worship creation and whose followers worship no creation. Other religions may have in the beginning taught not to worship creation, but the fact is now the rest (christians, buddhist, hindus, konghucus, etc) are worshiping creation. The exception is maybe orthodox judaism.
2. Allah is the only one that claims He is God (in the Qur'an). There is no other "deities" that directly claim they are god, it's always their followers who made the claim that their deities are god.
3. Islam is the only religion that addresses and gives guidance to ALL aspects of human life. No other religion is even close. If a religion is the true religion from God, surely it gives guidance to every aspects of human life, not just spiritual.