2 Sundown SA-12's or 1 Sundown X 12?

[okiestylin]

So given my setup with the 1200d amp will the 2 12 sas only be about 3db louder than the 1 x12? And also would 2 sas hit as deep as my x12 because I'd rather have the deepness of the x than slightly more output but not as deep with the sa 12s..