So far as I can recollect, I've only used/had the Victorinox.
I've never had a problem with them or had to replace the scissors spring on my Huntsman, Signature, or Classic.
I suppose it is possible the SAK I had when a lad 60 or so years ago was a Wenger. I don't remember if it was a Wenger or Victorinox, or even if it had scissors.