difference on two queries which is better in terms of performance

[jansky]

sql 1

$SQL=="select table1.* , table2.* from table1 
    left join table2 on (table2.id = table1.foreignkey)
    where 
table1.idsofmulitiple = whateveralue
  and 
table2.fieldsofidentity = whateveralue 
";

vs

sql2

$SQL=="select table1.* , table2.* from table1 
    left join table2 on (table2.id = table1.foreignkey and table2.fieldsofidentity=whatevervalue)
    where 
table1.idsofmulitiple = whateveralue

";

[laserlight]

Why not test and check for youself?