Not sure what kind of parallel universe I am living in, but when I ate at Bourdain’s favorite Roma Sparita the cacio e pepe had about the same amount of pasta as Jon and Vinnys when I had it there, albeit, it is plated better at Roma Sparita:
Jon and Vinny’s uses thicker bucatini, which is perhaps giving and appearance of there being less? I don’t know… having eaten both dishes, they seem to be about the same to me in terms of portiion size.