Biting into a large nugget, I heard a crunch and felt crumbs fall off my lips and onto the table. I've tried the Popeyes fried-chicken sandwich multiple times — fresh at the restaurant and through delivery — and each time it was soggy and mushy rather than crunchy in the coating.
When I pinched a piece of nugget breading between two fingers, it was hard and had no give at all. When I did the same with the sandwich — even a piece that had been unaffected by sauce, pickle, or bun — it smushed right away and released oils that ran down my fingers.
So considering the physical aspects of fried chicken, the white-meat nuggets are better executed than the fillet on the chicken sandwich.