When I got my 4720 this past spring, the iMatch was back ordered. So the dealer gave me a used old style one until the new one came in. I kind of forgot about it till last week. The dealer brought it out the other day, and I just put it on today. I thought I would snap a few pictures of them side by side.
I'm pretty hard pressed to find any benefits to the new style. You can see that the top hook of the new one has AT LEAST 1/2 inch less reach.
The top hook assembly IS quite a bit "beefier" on the new style however. And there is some additional welding on the lower hooks. You can see that the bottom pins were redesigned with a more standard component.
I'm kind of torn now. I'm tempted to keep the old one.