Put in order of ballistic performance, the 6.5 Creedmoor and the .260 Remington are almost neck-and-neck, pushing the same weight bullets at about the same velocities from almost identical case capacities. The 6.5×47 Lapua in factory form lags by 100 to 200 fps due to less powder capacity; however, it has already gained a reputation for having a strong case that puts up with the high pressures some reloaders push in their custom rifles. The .260 Remington’s main problem for the reloader is lack of high-quality and affordable brass and to date there has only been one factory load produced which was appropriate for serious long-range competition for the non-reloader. The 6.5×47 was designed for intermediate-range competition and very accurate ammunition is available from Lapua; however, these factory loads are at a ballistic disadvantage at long range compared to the .260 Remington and the 6.5 Creedmoor.
ballistics chart
http://www.remington.com/~/media/Files/Catalogs/2009/Remington_09Catalog_Ballistics.ashx
Thanks for the links.