Not so.I can tell you most decks besides a 3 point brush hog or flail will struggle with that height unless you take half passes and only do it in very dry conditions. I wouldn't even try to mulch that
As I stated I just mowed this yesterday with the X585 set at a 3" cut and had no issue. And I am not trying to mulch. Also, as I have said, the deck on the 4110 acts like it has a full mulch kit on it but it doesn't. The main issue I see with it is that it just doesn't discharge. The clippings stay under the deck until they are completely turned into pulp. Blade style is the only thing I can come up with at this point.
The X585 in the picture is using G6 Gators so I am getting a set for the 4110 to see if it helps.
The area in the picture is not as heavy as it may look. There is a bunch of that stalky grass in areas but the main grass is probably 3-5 inches and cuts easily.