Is One Alpine Type X 12 Louder Than Two Alpine Type R's On An Alpine PDX 1.1000?

I had two Alpine Type R 10's in a Sound Ordnance Ported Box 1.2 Cubes per chamber tuned to 36Hz on an Alpine PDX 1.1000 amp. I just sold those subs and now I want a single Alpine Type X 12" on the same amp and was wondering if the single 12" would be louder than the two Type R's?