Ah, well. It's good to dream! It's just such a great price – relative to the alternative Phase and 'Blad offerings, of course.
Haven't seen any specific tests of the 50c, but it would be extremely surprising if it's not exactly the same sensor. I don't think CFAs differ either, they could be different from Sonys 35mm sensors though. At some point I hope for a side-by-side raw test shot from Pentax 645z / IQ250 and H5D-50c, by processing them in RawTherapee you can apply the exact same processing and then see if sensors differ or it's just the raw converter's pipelines. I don't think it's likely that any dealer would provide such shots to play with though.
I'm no sensor design specialist, but it does seem to me that having an option to buy the Sony sensor without microlenses would not make much sense if you could not also get it with proper light shields. As being without microlenses is supposed to increase angular response (at least without ripple artifacts) you need light shields too to make it worthwhile otherwise you just get lots of crosstalk. While not having microlenses probably just removes one layer from the sensor and doesn't change much at all, having light shields would be a substantial design change. All indications from the IQ250 raw files I've looked at is that the sensor has very weak shielding between pixels, thus it would still perform very bad with tech wides even without microlenses. The microlenses that is there don't ripple either as on the Dalsa, so probably there's not much gain at all from removing them.
Additionally, the CFV-50c would perform worse with the V system without microlenses, so no I have no hopes there that it would perform better than an IQ250 with a tech cam :-\.