I wouldn't scoff at either gun, however if I had to choose, it would be the 300 win mag.
I personally was in the market for a rifle not long ago and was looking for something that could take down almost anything in north america. I was looking at a 300 Win Mag, but they had a 30-06 right next to it. I decided on the 30-06. Ammo is much cheaper, you can get it almost anywhere, and you can get off the shelf ammo from 150 gr up to 220 gr.
I just can't justify mag rounds, but then again I don't take many shots outside of 200 yds.
It's a fact that 70 percent of the people who purchase heavier tackle do so with the categorical I just lost a huge snook! Einstein Hairdo.The other 30 percent have either Tarpon Fever or are sporting a hand cramped into a claw from a deepwater grouper.