Yes the CAMM-ER VLS is a smaller footprint because the missile is narrow diameter allowing its firing from these GWS.35 vls. Its one of the reasons that it was chosen by PN (and i have been the biggest proponent of it for years). But each cell carries only 1 missile. While its footprint allows more cells (roughly 2 or 3 :1 cells vs a larger VLS like Sylver A50 or Mk41 or MDAS) that means a larger vls as above may be 12-16 cells. Those VLS cells however are large enouth to quad-pack CAMM-ER Which would enable 48-64 CAMM-ER which is a far cry better than the GSW.35.
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PN likely went with GWS.35 for babur because of factors of cost and expedience. Firstly only a handful of launchers are currently used for the CAMM-ER. Its own GWS.35 varient, the American VLSs (ExLs, Mk41 and Mk57) and Sylver (specifically A50). The French and American options arent available to Pakistan (Mk41 was even denied for Turkey leading to MDAS development). So that only left GWS.35. Beyond this, PN didnt have opportunity to really wait for MDAS which itself is not certified for CAMM-ER as of yet (if it ever would be - although dimensions would allow it for sure). In the future it is possible that PN pushes for it to be integrated to MDAS but as
@arslank01 points out, the MDAS itself is not likely to be cheap. That said, i would still push for that if im PN. Given it dramatically improves the missile capacity for Baburs, Yarmooks, and Possibly F-22P in a future MLU (likely there exists the space below deck for a VLS given the Thai Naresuan class got 8 cell Mk41 VLS in the location of the the F-22Ps deck for FM-90.)
Baburs Yarmook B2s (YB2) could likely fit two 4 cell units (total 8 cells) in the locations of their 12 cell GWS.35s which would increase their potential load outs of CAMM-ER from 12 to 32. The F-22P could probably fit a similar number of cells of MDAS (8).
Additional constraints may be the cost of that many missiles for a full load out (nearly tripling the missile capacity is pretty expensive, though less than a repairing or replacing a severly damaged warship, and PN doesnt need to quad load them for peacetime missions).
I personally think such an option (MDAS) is likely being considered. One also needs to question that YB2s came without VLS Cells installed. The Baburs left port with the protective mushroom caps over their VLS cells. YB2s did not come with any such cells installed. The thing is the caps can be used for protection of the cell when not in use (or empty) and are removed when ready to fire. As such i suspect there are no cells in the Yb2s mission bays. I would imagine it would have been cheaper to have these cells installed at the time of construction rather than later, leading me to think PN may have a different launch solution in mind for YB2s. Most logically given future collabs with Turkiey likely, it would be MDAS. (pure speculation on my part).