I load for two brothers and one likes the 130TTSX and the other likes the 140TSX. They both have killed elk with their respected 270 load. Splitting hairs really. I think which ever you can have the best group with is the one I would lean towards.
Like everyone else said whichever shoots best as long as it is a well constructed bullet. My brother personall shoots 130's out of his and has put a lot of elk to sleep with it. O'Connor who is well known for his love for the .270 used the old 130gr. winchester silvertip (not balistic tip) ammo on many an elk hunt. The 130's shoot as flat as a frozen rope if you are a MPBR guy rather than a balistic plex or turret spinner.
whether 150 or 130 get a good bullet, tsx (any variety), accubond, partition, a-frame, etc
As I sit and glass, which is common for hunters out west, I have sort of quickly discovered something I never learned when I was younger.
In my youth I had enthusiasm and spirit. In my middle to advancing years I have creaky knees, arthritis, and I tire more easily than I used to. Where I used to sit on the cold hard ground I now look for that soft spot to sooth my tired muscles. That leads me to my tip.
Carry your soft spot with you!
In my pack I carry an air filled, ultralight, camping pad....