You have probably grown used to the low down torque of yours. Back to back when driving both as they were intended to be driven, the MPS will be much faster, but in general driving it is probably a bit less flexible due to the nature of the torque delivery on the 2.2D. The MPS will be about the fastest and torquiest hot hatch which meets your specs, so you might have to re-consider your options if it doesn't live up to expectations!
Remember that your car is already stage 1+/stage 2 tuned as well. Do the same to the MPS and it will be in the 320 - 350BHP range.
I suppose you have a point.
Hmm i really need to think