Actually , all the major MF brands namely Leaf , Hasselblad and Sinar besides Phase uses ,over the years , more or less the same sensors .
Therefore the blow up capabilities are similar.
The difference would be in the lenses used for the sharpness part ,
The different capture software for moire and noise control in the shadow areas and ,
The Camera functions ( like the good autofocus in the Hasselblad H series ; the tilt shift and swing of the Sinar 4x5s and the touch screen ease of the Leaf).
Not many would rent out their MF to people they are familiar with .
You would do well to engage a qualified assistant from the Professional Assistants group.
Try contecting Zam at 98718074 or Halid at 90067388.
They will provide the guys who would rent all the equipment you will need for your shoot.
Also arrange the Studio , props , models and operate the software.
And finally pack and return all the rental equipment .
Professionally done .