Depends on how you will use your garage....what kind of work you do. Metal will protect the walls better but may not look as nice, IMO. I have had drywall in our current attached garage for 17 yrs with no heat except intermittently when working on a project during cold weather (teens) with no effect on the walls.
If you go with drywall, suggest you either keep it up slightly off the floor or stem wall to prevent wicking moisture or use J channel on the bottom edge to protect it.
Glen