For my fellow law geeks:
18 USC §921, which defines terms for federal firearms crimes, defines a conviction of a “crime punishable by imprisonment for a term exceeding one year” in terms of state law, so a Texas deferred adjudication probation for a felony is not a conviction, and does not bar firearms possession.
§921’s definition of “misdemeanor crime of domestic violence,” by contrast, doesn’t incorporate state law, so a deferred for a misdemeanor domestic violence assault may bar firearms possession under federal law.
The bottom line? For federal firearms law, a domestic violence aggravated assault deferred is better than a domestic violence assault deferred.