As an owner of a Matias Tactile Pro, and have tried the original ADB keyboard (Alps Cream), I can say that even the old, worn out Alps creams, the quieter and more mundane of the original alps switches, were still tactile. For the Tactile pro, it is very tactile but it is loud as an old farm tractor. Specifically for the quiet pro, I cannot testify, but I would advise buying a new keyboard from matias. The AEKII, although a great, will require a Griffin IMate, an expensive object that will allow you to connect an AEK to a USB enabled PC.
My vote is for a new Matias, as it is brand new, modern, has NKRO, and the Built in USB hub.
Yours,
AfterDark3