With those bullets he's not looking for a Long Range rig, so either one would do fine. A 270 with a 130 TTSX will put Elk in the freezer within 400 yards...a Partition or Accubond just as well.
After spending many years with rounds like 300 Win, Rum, 7mm Mag, a few of my buddies have adopted the 270 WSM as their LR Elk round. LR to them is past 800 yards.
They like it because it hits just as hard, drops the Elk just as fast and with less recoil in a lighter rifle.
They don't shoot factory rifles or factory loads...they are gay though.
I'd be looking at a Montana in 7-08, or 300 WSM, but with the 270 WSM you have a 270 AND a Magnum...now how could that go wrong?
