Artemis 1 vs Apollo 17: 50 years apart, which was the greater challenge?

Is it easier to land on the moon for a sixth time, as Apollo 17 did, or to enter Earth's atmosphere with a new approach, like Artemis 1's Orion capsule will do?

Artemis 1 vs Apollo 17: 50 years apart, which was the greater challenge?
Is it easier to land on the moon for a sixth time, as Apollo 17 did, or to enter Earth's atmosphere with a new approach, like Artemis 1's Orion capsule will do?