i would go with the pearson. yes 2 feet makes a difference because it also gets wider with length. i would think the big thing you would want is if one has a better galley, and a holding tank vrs a porta potty.
now we also need to think long term maintenance type stuff. how old are the sails on both boats, how about the rigging. a 20 year old boat is getting to the point where it will need new standing rigging, maybe needs its now. to get new sails and rigging you can spend easily 4 grand, but if both boats need new sails then thats a wash. also does either boat have an inboard motor vrs an out board, because if it has an inboard that is having problems that can be costly too. but a diesel will be cheaper to run in the long run