Tough call. Guessing the .308 is a bolt action?
Both bolt action and AR10
Wide open fields ? High hog count in smaller fields ? Lot's of variables.
Mostly will be picking off pigs on feeders. Terrain is woods.
Varies wildly IMO. .308 is plenty I don't think the 458 is necessary at all and expensive unless you are shooting sub-sonic then there is no comparison the .458 is the clear winner.
90% of the hogs I kill are with .223 or 7.62x39.
I dont have can that I can use with 458....... yet. I am also drooling over the 8.6 blackout so I may go to 338 vs 458 suppressed. I can do 308 suppressed.