I have a larger tractor such as the OP and have a different experience than what the general consensus is on here.
The EA grapple recommended on here has too small of a jaw opening IMHO. (42") This is one of the shortfalls of many flat bottomed grapples. Additionally it is harder to grab a log with that style and due to the way the jaw closes, you are more likely to grab the log near the front of the grapple, which moves the weight that much further ahead, limiting your lift.
Picking up logs with a clam style is much easier and faster plus the log is pulled close to to face of the grapple maximizing your lifting ability.
Any grapple can pick up a lot of brush, but a larger jaw spread lets you better handle larger brush piles. I can handle 5-6 feet tall stacked brush with no problem with the 70" opening on my grapple. Smaller grapples have to pick the top off and risk running over debris and possibly running something through a vital part of the tractor or work with piles less than their jaw opening. You have a bigger tractor, why not move more material?
How much digging do you want to do? My grapple is 84" wide and weighs 825 lbs and I can easily bury it to the first crossbar without even trying anywhere on my property except maybe the last two weeks of August. Ripping out brush, brambles and small trees for its full width is no problem. If I want to dig out a real stump I put on a stump bucket.
Having the ability to clear close to the width of my tractor is more important than a perceived better digging ability IMHO. Additionally the greater width compacts and holds a greater amount of brush away from the tractor. Less brush falls out and it lessens the chance of driving over something that you are dragging that is caught in your grapple poorly.
I had a Michigan Iron and Equipment grapple on my DK Kioti and it was nice. But the difference is night and day with my current WRLong grapple on my LS. I much prefer the clam style.
Good luck in your search!
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