I don't agree with this statement but would rather put it "The 30-06 is vastly more versatile to the 45-70". That I'd go with.

There are sort-of specialty applications where the .45-70 is, I believe, superior. I just shot a .45-70 test today I haven't been able to duplicate with the '06. I'll report on it soon, hopefully with meat pictures attached.

If I could only buy one rifle and the choice was between the .30-06 and .45-70, I'd pick the .30-06.

But that all-round gun would be a bolt gun, not a Baikal double...

But a double .45-70, if capable of handling stiff Marlin-type loads would be a very useful rifle around here.