No, we do know. You are looking at names on paper instead of what actually occurred.
KB played in 5.25 games for us. Deonte Thompson wasn't on the roster until after the Cincy game. Zay Jones, a rookie with the yips, took the most snaps at WR for the Bills last year. Jordan Matthews came in during camp, missed most of it with a chest injury, injured his hand before the Cincy game, and finished the season on IR. Charles Clay missed time after injuring himself in the first half of the Cincy game.
And my point is that even if they were completely healthy (and add in Shady), that group doesn't hold a candle to Cincy's 2015 group.