If you're scoring at home, that's Sun CR-18 and studded Nokian: One, Soma Steel Core Tire Lever: Zero.
A plain old plastic lever teamed up with my last remaining Soma lever to finally defeat the Sun/Nokian juggernaut. Unfortunately, Plain Plastic Lever also lost his life in the effort, like one of the nameless red-shirted guys who beams down to the planet with Captain Kirk on Star Trek. So, final score: Tires/Rims: 2, Levers/Thumbs: 2.
The tires are on, so I call this draw in favor of Levers/Thumbs.
If I get a flat before Spring (when I switch back to my no-tools-needed-to-install Michelin slicks), I'm calling for a ride.