‘The only question for the 24-year-old Manning is whether he can catch Kurt Warner and Brett Favre, or have to be content as the NFL’s third-best quarterback. On Sunday afternoon at Ralph Wilson Stadium, Manning’s wares will be on display against the Buffalo Bills and the league’s second-best defense. But Colts’ coach Jim Mora warns that when watching Manning, don’t expect to see a finished product. “Peyton is still learning … he’s still a young quarterback,” Mora pointed out. “Everybody expects these unbelievable things from him … and I probably do too, because he’s done some great things. So I don’t want to sound negative in any way. Still, there are things that happen in games that he hasn’t seen before and that he’ll learn from.”‘