Departing ATL - no difference from a domestic flight. Domestic and international departures are screened identically by TSA. But if you are flying an obscure airline they may not participate in PreCheck. Check the list of participating airlines: https://www.tsa.gov/precheck/participating-airlines

Departing CDG - same rules as if you were a non-PreCheck passenger in the US. One clear bag, taken out of your carry-on luggage; 100ml max per item.