Personally, I wouldn't risk it.
The tricky part about assisted openers is that they're not switchblades as far as the Federal Government is concerned. This means you can find them in pretty much any state, even at places like Wal*Mart. People figure that if you can get them at Wal*Mart, they're legal to carry. Which isn't necessarily true.
IMO, in regards to WI's laws, the difference between an assisted knife and a knife (like a Spyderco) which you can whip open with a wrist flick is that the expected method of opening a Spyderco is normally manually moving the blade. The assisted only opens assisted. What I mean is a Spyderco is intended to be opened normally, while the assisted can only open in a snap. Which would be much harder to explain to a cop or argue in court.
That's the way I see things, but I'm not a lawyer, blah, blah, blah, etc.