t -tap or lever nuts

I used the lever nuts, they are great and easy to use.  A bonus is any reconfiguration is a snap, no wires to cut, etc., just unlatch, reconfigure, and latch again.

I use lever nuts as well for drops. Easy to use and reconfigure if necessary.

I'm a bit confused. I have used posi-tap connectors for my bus wires, and although these are a bit expensive, they don't require cutting the bus wire, and are very easy to remove and relocate. Are the lever nuts the "Wago" units? Don't they require cutting the bus wire? Some other design of lever nut that does not require cutting the bus wire?

Thanks,

Michael