There's no hard-and-fast rule, especially if you have physical problems from injuries, etc.
However, in general, for the healthy population, yes, a straight, Prince-of-Wales, or conventional pistol grip DOES carry more comfortably, shoulder faster and more consistently, point and swing better for bird hunting than an AR-15 style pistol grip and stock.
However, in general, for the healthy population, yes, a straight, Prince-of-Wales, or conventional pistol grip DOES carry more comfortably, shoulder faster and more consistently, point and swing better for bird hunting than an AR-15 style pistol grip and stock.