The 100s are John Deeres lawn tractor the 110 is a garden tractor capable of ground engaging implements like a plow. The main problem with the 60,70 and 100 is that the ether Tecumseh or briggs motor is usually done in and parts are very hard to find. IIRC they have a 3/4 inch crank shaft the isn't around anymore so if you repower its almost impossible to use the pto so that you have a deck to mow with if you just want a stuff towing mule than you can repower and have a RF Deere cheaper than a 110.