Superior gas handling: advantage Remington, no doubt The other things you cite are anecdotal and while I do not doubt you at all, they are function of poor quality control and not design and overall the 70 is light years ahead . and of course you can use your internet engines and compare Remington to Winchester litigation. I can go on but you get the idea and in the end, the bolt STILL can't be locked.
Then there's another bolt action that's light-years ahead of the Model 70--the 1898 Mauser.