Get ordered twice, not exactly the same product!

Today I received my 2nd audio switch and now used as an input switch (TV, PC, mobile phone -> speakers) and one as a starting switch (PC Audio Signal -> PC-speakers, headset, sound system).
Works flawlessly in both directions!
You hear no noise or the like. Am completely satisfied with the Quality.

BUT:
Some customers report a "worn-out" knobs.
On my first audio switch I could understand that never, since the switch snaps really perfect and by no means "spongy" is.

After today (2 years after 1 purchase) arrived my 2nd audio switch, I had to realize, unfortunately, that here a slightly different switch is installed.
Outwardly he looks exactly the same, however, snapped this one not as beautiful as the other. But that's all good to an extent and that is whine at the highest level)
Could imagine that at this switch after a while this "spongy" acting latching occurs, the others have told me.

I still give it 5 stars because the, as I said, to complain about all the highest level, and the switch is still properly fulfilled his service!