I guess I assumed we were talking about the 55 and just now seen the topic was discussing the 60". There is over a 100# difference between the HI and catawba 60" grapple while the HI still uses the 2" pipe over the 1.5" pipe of the Catawba. And the HI still has a 2.5" wider opening which is very important IMO. The HI also comes with 5/16" thick guard's that protects the cylinders. The Catawba doesn't have that feature which is something I noticed when I was considering.
The center hinge is something I look forward to seeing how well it helps or hurts the overall construction. I was worried it could potentially not allow minor flexing and causing it to more easily tweak the upper shell.
Anyways, I figured I would share what I seen differently between the two and why I chose the HI over the Catawba. I know some would rather have it now than wait a few weeks, which I certainly understand. Good luck in whatever you choose.