I know some of you are scratching your heads about the tall grass. I have a customer who can't pay to cut every 1 or 2 weeks. they want to wait for every 3-4 weeks, so grass ends up 18" high sometimes. Picture a long rectangle of 11 acres. A very windy stream cuts right through the middle. I cut along both sides as close as possible with flail mower behind my M-7040. However, inevitably there's still a swath along the stream where it twists around and there's a couple horse paddocks too small to cut with my 7040. Then there's about 2-3 acres of garss cut 1X per week I will also be cutting.
So it's tought to explain, but the tractor will mostly be used for normal grass cutting. But I have to be able to cut a few acres of 18" tall grass every 3-4 weeks.
I also think the 7-iron is a tougher, deeper, less baffled longer lasting mower deck that will stand the test of time better than a 62C. Drive over feature is icing on cake for when I want to snowblow or rototill, etc.
I do have some evidence that 7 iron is less prone to clog by others who have operated both and said 7 iron stays much cleaner. It should, it's a more volumous deck with fewer obstructions.