I honestly think the two separate amps placed together may even be a little bit louder because the cabinets are tighter and may project more sound forward.
The specs on the 112 plus say the Maximum Peak SPL is 125 dB SPL. And the 212 says 131dB SPL which isn't too far off from that of a single 112.
According to this site, 120 is the threshold of discomfort and 130 is the threshold of pain. So either way, fully cranked these ought to be able to cause some people in the front to move back a few steps.