Which team had more home victories in the 2021 season's matches of the Bundesliga division, Augsburg or Mainz?
Bundesliga is the name of division; more home victories refer to MAX(FTR = 'H)'; Augsburg and Mainz are names of teams and refer to HomeTeam;
SELECT CASE WHEN COUNT(CASE WHEN T1.HomeTeam = 'Augsburg' THEN 1 ELSE NULL END) - COUNT(CASE WHEN T1.HomeTeam = ' Mainz' THEN 1 ELSE NULL END) > 0 THEN 'Augsburg' ELSE 'Mainz' END FROM matchs AS T1 INNER JOIN divisions AS T2 ON T1.Div = T2.division WHERE T1.season = 2021 AND T1.FTR = 'H'