2003 duramax deal

So I have been looking at buying a duramax and found 2 2003 duramax both have 160,000 miles on them. One has all records and was well maintained the other nothin on car fax exept it was own by Oklahoma department of motor vehicle. The one with all the records seems to have more power but the breaks seemed to be sticking. They both are 16,000$ any input would be nice. Thanks