I own a Hustler Sport Mower with a 48" deck. I am going to buy a new set of blades, but when looking at parts list, it is a multiple choice, and I am not sure of the differences. I recognize that one of the listed blades ( 796623 - MUL-F-CW) is a mulching blade, but I have no idea in the differences between the other three: 601123-L-F-CW, 796631-GAT-F-CW, and 795757-H-F-CW. Can anybody tell me what the differences in these blades is?