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sassynapoleon t1_ix6u2qi wrote

It's not Orion vs Apollo, it's SLS block 1 vs Saturn.

See SLS variants here.

The additional delta V necessary for a more direct trajectory was supplied by the S-IVB 3rd stage on a Saturn V, and a similar "exploration upper stage" is planned for the SLS 1B crew variant so that it can have a similar trajectory.

This wasn't a requirement for Artemis 1 since it was unmanned, and the spacecraft has solar panels allowing for a a longer path that lets NASA log more data before sending it back up with crew on board.