Schwalbe Ice Spiker vs. Nokian Extreme 294
So there you have it: two great winter tyres, both in 26" (for the purpose of this poll), both 2.1" wide, about the same number of studs (294 for the Extreme, 304 for the Ice Spiker), and the studs are made of Tungsten Carbide in both cases. Both have wire beads.
Both companies have more experience in making studded bicycle tyres than most (or even any) other.
The Nokian Extreme 294 is 950g, the Schwalbe Ice Spiker is 980g. No big difference there, either.
The Ice Spiker has KevlarGuard puncture protection.
The Nokian Extreme has deeper knobs, better suited to bite into loose snow.
Apart from this, I wouldn't know. I have started recently to use both of these tyres, and can't make up my mind which one I like more. It's early days for me.
I'd love to hear your opinion.