Leslie Lawrence Koch - Differing sources show different dates of birth

My original source (Fullilove) showed my Grandfathers DOB as 2 November, 1904, but the Find a Grave site shows it as 23 November, 1903. I believe the FaG info is correct, because according to my Mother and Grandmother, they both say Leslie was only 28. I don't have a premium ancestry account so I can't access the Indiana Death Certificates to back this up. Any help out there? Thanks