Steve,
Could you describe for us some specifics about exactly what the "different perspective" is? I've belonged to both for twenty-some years, and have never seen a dime's worth of difference. For my money, Model A Times is the magazine that's worthwhile.
Carl,
One way to choose is to notice which outfit you local Model A club is facilitated with. Most clubs are affiliated with MARC of MAFCA and require membership.
Also, there was a long, contentious thread on this several months ago you may be able to search out.
Steve