Can you tell the difference between these two photos? It will probably take you less than a minute to figure out that the second one is missing the storage bench. Other than that, does the deck really look any different? As in twice a large or prettier or anything that would make you want to buy the second place over the first?
I'll give him some credit, it was just a suggestion not an imperative. Many of the realtors I've encountered act as if the only reason your place isn't selling is because you didn't take their staging advice to the letter.