Why are hydraulic roller lifters, different on different sides in the engines?

As I stated in #5, "cuda888" (who I doubt have export engine) had the exactly same thing, even pictures of it, if you just read previous posts...

The small spring that holds the ball or plate have the same strength, it's the bottom bigger spring that's different.

Both engines had the same tapping sound a few seconds when started cold so I reckon one side ( the harder or the softer one?) must be the one to have problems holding pressure...?

What d'ya know: sudenly I CAN show pics!!! :) :) :)
This one is from cuda888's post.

(& anyway, I'm REALLY happy the answers got rolling now!)

Drive-left, Pass-right.jpg