The other thread's trailer was a modified flat bed style used for over the road hauling, dual wheels, probably air brakes etc. Big GVWR rig.
This trailer is a modified light duty trailer, I would bet it needs three axles for the weight of the trailer with all the decking versus the actual weight of that boat.
That lifting harness is pretty neat. Obviously tied into the main frame work of the boat. It is surprisingly balanced given the engine is fully on one side of the connection point.
_________________________
"That's my boat..."
-Forest Gump