Question: What is the difference in the number of goals scored by Pavel Brendl during the regular season versus the playoffs in the 1998-1999 season?
SQL: SELECT T3.Rs_G - T4.Pf_G AS diff FROM ( SELECT T2.PlayerName, T1.G AS Rs_G FROM SeasonStatus AS T1 INNER JOIN PlayerInfo AS T2 ON T1.ELITEID = T2.ELITEID WHERE T2.PlayerName = 'Pavel Brendl' AND T1.SEASON = '1998-1999' AND T1.GAMETYPE = 'Regular Season' ) AS T3 INNER JOIN ( SELECT T2.PlayerName, T1.G AS Pf_G FROM SeasonStatus AS T1 INNER JOIN PlayerInfo AS T2 ON T1.ELITEID = T2.ELITEID WHERE T2.PlayerName = 'Pavel Brendl' AND T1.SEASON = '1998-1999' AND T1.GAMETYPE = 'Playoffs' ) AS T4 ON T3.PlayerName = T4.PlayerName