I can safely assume we have not seen the same Pepe. Comparing him to Iwobi is a bad joke.
Forget the goals he has scored. Giroud is a 30 goal season man in France and a 20 goal season man in England. It's pretty much across the board that it is easier to score in France. The quality of defenders, keepers and teams is lower.
Look at what he does other than goals and I'm afraid it's beyond average. He dribbles in the wrong areas. He loses the ball and doesn't track back. He doesn't actually take his man on and beat him that often. He isn't a 50 million pound player and .
If we buy a winger from France we buy someone who beats players for fun and has a really high ceiling. Not off one season based on a goal tally.