It isn’t really. The 6.5 Swede has more case capacity and is more powerful. 6.5cm is based on the 308 cartridge, similar to how the 243 is a necked down 308 case. When 6.5cm first started getting popular I remember thinking what’s the point of another sized-down 308, we already have a bunch of those available. I would basically say sure, if someone were willing to use something like 243 or 270 for moose or black bear then 6.5cm is more or less in the same class as those. My grandpa used to hunt moose with a 30-30 because it was what he had but if you already have a 308 or 30-06 why not use that?