I'm a winno. So, the corkscrew is a plus.

I had the same question, so I have been researching them. Wenger is actually owned by Victorinox. They bought them about 5 years ago. Both seem to be quality, according to reviews.

Slogans:
Victorinox - The original Swiss Army Knife
Wenger - Genuine Swiss Army knife

The one pictured above is the official issue Swiss Army Knife. And this one is the official German Army Knife. both are Victorinox.