I have also done quite a few manual reversion operation check flights in the B733.
My experience of the "feel" is the same as Lord Spandex! Our simulator is subjectively close to what I have experienced in the real aircraft.
I also had to fly the B732 aircraft as part of my initial conversion in a manual reversion mode due to the simulator being unable to replicate anything like the real aircraft (it was an early three axis model). It was a long time ago now but recall that the B732 was quite reasonable to control and not that heavy, however the 300 does feel a little more ponderous so maybe some of the changes to the wing contour may be a reason?