Which is bigger, cat 1 or cat 2?

Cat 2 is bigger than Cat 1 in tractor three-point hitch categories. The categories are numbered by size and capacity, with larger numbers indicating bigger, stronger hitches for larger tractors. Category 1 is for small compact utility tractors 20 to 45 horsepower, with lower link pins 7/8 inch diameter, top link pin 3/4 inch diameter, spacing between lower arms about 26 inches, lift capacity up to 2000 pounds, used for 4 to 6 foot light implements. Category 2 is for larger utility tractors 40 to 100 horsepower, with bigger pins lower 1-1/8 inch diameter, top pin 1 inch diameter, spacing about 32 inches, lift capacity 3000 to 5000 pounds, used for heavier 6 to 8 foot implements. Physically, Cat 2 hitch arms, pins, and hydraulic cylinders are thicker and heavier to handle greater draft forces. In terms of tractor size, Cat 2 tractors are larger and heavier than Cat 1 tractors. You can use Cat 1 implements on Cat 2 tractor with bushings that adapt smaller pins to larger holes, but you cannot safely use Cat 2 implements on Cat 1 tractor because they are too heavy and would overload hydraulics and cause front end instability. So if asking which is bigger, Cat 2 is bigger, stronger, and rated for higher horsepower and heavier work than Cat 1, with Cat 3 and Cat 4 being even bigger.