the first file is the index. Tommaso's last name is spelled Mingolelli. the second file is the death record in which the last name is spelled Mincolelli. i have seen this on a number of records for individuals with this last name. however, the spelling difference doesn't begin to show up until 1851.
I am curious as to your thoughts about what accounts for the differences in the spelling of the last name in the index and on the record.