I love my 35, there is a reveiw i did lower down in thsi section. I have not shot the 31 but from all reports they are also a sweet shooter. Good luck
If you havent dicided yet shoot the 31, it shoots like a 35 in ata bow. I never shot the 35 before buying the 31 but, you will not know your shooting a 31 ata bow! Either way you cant go wrong. All the things the Cooke wrote in his report are spot on with the 31 also.