Mortgages modified by Freddie Mac performed slightly better than Fannie Mae loans in the short term while the performance gap between the two GSEs widened further one year after modification, according to the Office of the Comptroller of the Currency.OCC’s latest Mortgage Metrics Report noted that Freddie loans had an 11.3 percent re-default rate three months after modification, while Fannie mods saw an 11.7 percent rate. At the six-month mark, Freddie stood at 18.1 percent compared to Fannie’s 18.8 percent.