I think the impetus behind WHY Lapua came out w/the 47 was ammo/brass sales, cornered the market w/a proprietary round.

I have wanted a 47, but 95+ percent sure I am doing a 260 on my Fluted Varmint Bartlein 8 twist, 23", that will be screwed on an Alpine action.

More and more brass and ammo options being developed. The 47 has few cons, but according to many, it must be pushed hard to match or come close to 260 performance w/heavier bullets.

The 47 surely will equal or better accuracy, but the difference may not be meaningful outside bonafide official competition. Quality custom 260s w/good loads run very tight accuracy and brass can be ready made.

If I wanted to step up in performance w/no concern on bbl life, a 6.5-284 might get the nod. A 260 AI will come close to it as well w/a little longer bore life.

http://www.snipercentral.com/match260ammo.htm

http://demigodllc.com/articles/6.5-shootout-260-6.5x47-6.5-creedmoor/?p=1

http://demigodllc.com/articles/the-case-for-260-remington/?p=1

If you want cheap affordable factory ammo and ready for competition, the Creedmoor is compelling, but I'd rather the common 308 brass based 260 for simplicity and accessibility to common brass for handloading.

They are VERY close in performance, but subtle differences-pros/cons to each.

Good luck.