La única diferencia que he encontrado es esta:
Código Delphi
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procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject; const Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState);
procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject; Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState);