Not Alps.
Acer switch, which is clicky. White and black Acer switches differ only in the colour.
Acer 6311 is well-known to have Acer switches and nothing else.
If I recall correctly, the click point is somewhat lower in the stroke than white Alps, other than that, it feels a lot like Alps. The Acer switches on my keyboard are a bit scratchy, but that may be just my keyboard.