I 'd like to give this one a shot from a serious point of view.

As far as experience with both cartridges,I have used these two to take scores of deer and dozens of hogs as well as the occcasional elk,bear,and antelope.

There are some subtle differences in the field IMHO.

The 30-06 tends to make bigger wound channels,exits more often,and tends to leave a bigger blood trail.

If you are hunting in thick,wet cover where blood trails are hard to follow,I think the 30-06 is a better choice.

If you are hunting in places where the size of the blood trail is not critical,take a 270,it tends to shoot flater and is a bit more pleasant to shoot.