Always more legroom in row 1. (thats row 2 on the 737-800 if seated on the left side.No row 1 on the 738 on left side.)
And a wall in front of you that you can stretch you leg on if your tall.
All other rows (exept exit) have standard 31" legroom.
All seats on all sas planes are the same no matter price class,exept on the A330/340