Ichigo has his visored masksIchigo drawing his sword doesn't mean anything. It only means that if ichigo stands there like an idiot grimmjoww could hurt him.
And via bleach logic, if base grimmjoww was equal to shikai ichigo then bankai ichigo is similar to released grimmjoww and then second release grimmjoww would be greater than ichigo. Even if ichigo had another power up they would be equal. This doesn't make any sense given that ichigo is not only the main character but is expected to defeat YH or ishida both of which are far stronger than any opponent grimmjoww will face.