At a glance they look like twins but they are completely different. The tuffline has pins that are cat 1 and cat 2, the woods has cat 1 pins all the way through and bushings for cat 2. The woods is qh compatible the tuffline is not but it is just a extra toplink pin hole. The top of the moldboard on the tuffline is flat and you could sit on it the woods on a angle. The woods moldboard is only braced with 1 piece of angle the tuffline has 2. The park stands are in different locations and the woods is round and the tuffline is square. I think the woods blade is longer. The piece in the back where the circular piece attaches with 4 bolts on the tuffline is made out of 3 pieces of metal welded together the woods is one piece that was made in a break. The upright supports for the toplink are different. The top link hook ups are different. The piece coming down from the toplink the goes to the 4x4 piece of metal is straight on the woods and curved on the tuffline. The tuffline has a lift hook. Woods, tuffline, land pride, rhino, and bush hog all have blades that look like this. I guess they all copy each other.