As usual, JB is largely correct but in this instance has omitted (probably for simplicity) the well developed and already available 6.5x47 Lapua which predates the 6.5 Creedmoor by at least 2 years.
At the best the Creedmoor was a parallel development done in isolation of products made in Europe. At worst there has been much mythologising to get around an almost exact copy of a well designed European cartridge which owes a great deal to the 6x47 Swiss Match by RUAG.
Whichever way you want to twist it, both work very well and can make an average shooter look good. The 6.5 Lap is very much a handloader proposition as factory ammunition is expensive, exquisitely manufactured, but ultimately not very available.
When is the last time you saw a selection of 6.5 x 47 ammo in a sporting goods store? Or a factory rifle chambered in this cartridge on this side of the pond?
