Well, there are pros and cons to both, but now that Lapua makes 260 brass, that has made the 2060 the clear choice for me.
The 6.5x47 is a beautiful round and can be very accurate. Its shortfall is its lesser powder capacity. That cartridge works best with bullets up to 130 grains. The 130 Berger is a fine bullet, but is ballistically inferior to the 140. The '47L can definitely get the job done with a 130, but with anything heavier, it bleeds energy and velocity. For long distance shooting you want the most accurate and highets Ballistic coefficient bulet you can find, Why limit yourself to the 130?
The 260 is an older design (Age does not matter one bit. Look at the 115 year old 6.5x55 for instance) and is based on the 308 case. It packs more powder, meaning you can achieve velocities pushing 2900 fps with a 30" barrel and a stout load of H4831. The 6.5x47 case is a good design, but I have my prejudices against the small primer. I have done a 6.5X47L for myself and I also have done the 6-6.5x47L the 6.5L was a good gun, and it was accurate, although it took me a long time to figure out what it liked. 6 6mm version was terrible.
The 260 would be my choice. Easy to make work, and you can use pretty much any bullet you want in an 8" twist with a 260. Accurate as hell in 1000 yard shooting. using a 139 lapua, 140 berger hybrid or 142 match king in the 260 and you will have to control your giggling while shooting.