Just a different sub alone isn't going to make it louder //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif
The BL should overall get louder and sound better than a Type R, given that you build a box that is optimal for the driver.
Type R's can get loud too, but it is all install dependent. Just a driver change doesn't mean anything without proper tuning/adjustments/etc...