The only experience of Kayaba and Sachs I have are on motorcycles and Kayaba always have the edge , this is not say sachs are rubbish but they tend to be on budget european bikes and Kayaba are on nearly every Jap bike as standard and the bikes fitted with Kayaba always outhandle and provide better quality ride.
Mx5 MK2 Twilight Blue Mica 2000 model no mods other than wheels got early Merlot edition wheels Kawasaki zx9 streetfighter, BMW 323i coupe,....oop north in sunny Lancashire on the edge of Morecambe Bay.
If you have a headache, do what it says on the aspirin bottle: Take two, and KEEP AWAY FROM CHILDREN.