Not that it matters, but I'll throw this in:
I started using the .270 while in high school hunting mule deer. That was a long time ago...I still use the .270 to this day, seeing no reason to chance, but was tempted with the 270WSM when it came out. Tried one, went back to the Winchester version, and I'm still hunting with my pre-64 Model 70 that I've had all these years. It's killed well over 200 deer, and I just don't know how another version could have done any better (while living in BC many years ago, we could shoot ten each season, so they really stacked up back then). My .270 was made in 1958, still wears her factory barrel, and still plunks my Sierra 130 grainers into .6" about every time at 100 yards. I've had the old girl since 1970...paid $300 for it back then.
Plus: less recoil, less blast, shorter barrel, more rounds in the magazine, easier to find ammo if that matters too. Usually a slightly lighter rifle too as a bonus.
The WSM is probably a decent caliber, but I'll never trade off my .270 Win for one. Here's my trusty Model 70 in .270:
This rifle is like an old friend.....oh wait.......she is! Calibers come and go, but the .270 Win will be with us for a very long time to come.