There are a few differences in what fields are available in the API (http://api.torn.com/user/258120?selections=personalstats&key=) and what's shown on the personal stats page (when comparing yours to others, such as http://www.torn.com/personalstats.php?ID=258120).
On the API, there are three fields which seem to be missing from the comparison personal stats page:
itemswon
attackhits*
attackmisses*
* These are both on your personal stats page, where more stats are available to you (http://www.torn.com/personalstats.php)
On the comparison personal stats page, there are several fields which are missing from the API:
Communication
Classified ads placed
Personals placed
Criminal Offences
Criminal offences
Selling illegal goods
Theft
Auto theft
Drug deals
Computer crimes
Fraud
Murder
Other
Missions
Missions completed
Duke contracts completed
Contracts completed
Mission credits earned
Other
Times voted
Would be nice to get these matching as it makes it easier for developers to do comparisons in their scripts.