The AEK II uses complicated
Cream Alps as opposed to White Alps. The Cream Alps are like the non-clicky tactile Black Alps, except they have rubber dampeners to reduce the noise made by bottoming out on the switch.
A lot of "Cream" Alps sliders are actually the same colour as the White ones, and they are often referred to as White Alps, which of course causes confusion with the
real White Alps, which are clicky and have quite pronounced tactility.
Alps are very prone to wear and age, and when combined with the relatively mediocre tactility of the Cream Alps, can make old AEK IIs feel like rubber dome keyboards.
There's a guide to Alps switches
here that shows how they work, and what the different colour codes correspond to.