Great question! This question comes from .The difference is simpler than most people think. A tarot reading covers the whole of your life. Relationships, career, finances, spirituality, health, transitions — whatever is happening in your world, tarot has language for it. It was built to speak to the full human experience, so nothing is off the table when you sit down for a tarot reading.
An oracle reading is filtered through a specific theme. Every oracle deck is created around a particular lens — ancestors, goddesses, angels, the moon, animals, affirmations. So the reading you receive is shaped by whatever that theme is. If someone is reading for you with an ancestor oracle, the guidance is going to come through an ancestral lens and is assumed to be messages from the ancestors. A goddess deck is going to speak through feminine archetypes. And so on. The deck's theme determines the vantage point of the reading.
I hope that answers your question