its pretty simple, this aint rocket science, more powder equals more recoil. The 30-06 and .270 arent known to be mules, but they do kick somewhat, the 7-08 can run neck and neck with the .270 with less powder, which equals less recoil.
Ammo selection aint the greates though, lots of options in the 140 gr range but thats it.
The 7-08 doesnt do anything fancy, it isnt a screamer, isnt the flattest shooting but its a .308 based case which makes it very accurate, its what a 7 mag is at minus 100 yds.