a_unique_person
Director of Hatcheries and Conditioning
They also run off a fuel that is much easier to work with.Today I learned that there's some enthusiasm for arguing about whether the space shuttle is a rocket.
Which isn't even the point. The point is that the shuttle rocket motors were reusable, and probably one of the best things to come out of that program.
My understanding is that the SpaceX motors are somewhat easier and cheaper to refurbish between flights.