If it has nonadjustable hook jump on it. It seems like some people that have the adjustable hook have had some problems hooking up some attachments.
I make that statement from some posts I have on here.
Yep, the non-adjustable has a little more depth available on the top hook. I have both and haven't had any problems with either but could see where the adjustable may have issues if the implements top bushing is recessed into the frame a bit more than normal.