The ability to do about 4 Dragon flights to the ISS for the incremental cost of a single 2011 Shuttle launch does mean the raw down-mass capability is actually pretty comparable, though.
One thing, though, Dragon won’t deliver is volume. There was lots of space in the Space Shuttle. (But I just wanted to add that for completeness sake, not to claim that the Shuttle was super awesome.)
Yes, but that volume would not have been used for station maintenance missions. If you look at the manifests for the shuttle, they hardly ever used all that volume even for station construction.
