In what way? Ruger receiver is cast, from what I understand the M70 is forged. Splitting hairs really but if cast is so strong how come we don't see any cast rifle barrels? Also the Ruger all weather stock is crap compared to the B&C, and lets not even get started on their Hogue stocked abominations! As for home grown, it was the home grown unions that contributed to the demise of the original Winchester, not that Bill Ruger was the biggest ally to gun owners himself either.
I'm slightly partial to the M70 myself and from what I've read of the new ones they're very well finished and put together, that's not to say I have anything against the Ruger's, I just think the M70's are more refined for close to the same money as the Ruger. Really comparing apples to apples in the end so I don't think we can say one is better than the other to any appreciable degree.