here are the exact stats
Tales of Vesperia
http://www.vgchartz.com/swlaunch.php?reg1=America&game1=Tales+of+Vesperia+-+X360®2=All&game2=®3=All&game3=&weeks=100
Disgaea 3
http://www.vgchartz.com/swlaunch.php?reg1=All&game1=Disgaea+3%3A+Absence+of+Justice+-+PS3®2=All&game2=®3=All&game3=&weeks=100
and yeap, Disgaea 3 got a steeper incline for the last 3 weekly sales. from 4729 to 5836 to 7936