Does it work for the dual sim model, it only states N960F, & not N960DS. I'm new to Samsung devices, don't know how the firmwares work here, with Sony it was an easier process.

Pretty sure that's just the software implementation of any future flagship, Note 9 doesn't have a 120Hz display, it's redundant.

Does the CSC change, and is it for N960DS (Dual sim)? And what about future beta updates? Would that have to be done manually? And whensoever the stable rolls out, would that need to be updated manually?