Over the years I've had quite a few .270 Winchester rifles. For a couple of years I also had a .270 WSM. I found mine to be quirky to deal with and accuracy was no better than any number of earlier .270 Winchesters. Presently I do not own anything in .270. I may have one more before I'm finished and if I do it will be in .270 Winchester in something with a 24 inch barrel. The difference then with a WSM will be small enough to be of no consequence.
Jim
Jim