Both are the "Falcon 9 Block 5" version. Earlier in the Falcon 9's history they were constantly iterating on the design, but NASA's certification for human spac

Both are the "Falcon 9 Block 5" version. Earlier in the Falcon 9's history they were constantly iterating on the design, but NASA's certification for human spaceflight required them to make seven flights on the same design. So it's both a proven design, and they're reusing one that has flown before. But not the most heavily reused one. https://en.wikipedia.org/wiki/Falcon_9_Block_5 https://en.wikipedia.org/wiki/Falcon_9_Block_5 https://en.wikipedia.org/wiki/List_of_Falcon_9_first-stage_boosters#Block_5 https://en.wikipedia.org/wiki/List_of_Falcon_9_first-stage_b...