Maybe fuel might play a role. The Raptor burns methane, the F-1 refined petroleu...

_0ffh 35 days ago | parent | context | favorite | on: How NASA brought the F-1 “moon rocket” engine back...

Maybe fuel might play a role. The Raptor burns methane, the F-1 refined petroleum. Another possible reason is that the designs may make different efficiency vs power trade-offs.