So then what is the difference that you see between them?
When I first started ice fishing probably 15 years ago, all we used was the "old school" equipment. Schooley style rods, peg bobbers, 4lb trilene XL, and a small teardrop with a waxworm. We'd change the line each year but it would be a mess as soon as it got cold. The line would get stiff, it would develop memory and make the jigs spin on the way down, the line wouldn't stretch out with a small jig so I know we missed a lot of bites.
Then, probably 7 or 8 years ago I started stepping into the new age. I bought a spinning rod and spooled it up with trilene cold weather (blue) 3lb. It was better, but still got pretty stiff in the cold. Was a lot better than the xl though.
Then about 4 years ago I started using trilene micro ice 3lb. That line was A LOT better. Nice and subtle in the cold, didn't develop a memory all through ice season, hung taught with a tiny jig, and was just overall a great line.
Last year was the first year I tried sufix ice magic. I thought there was no way to get a better line than the micro ice, but I was wrong. This line is amazing. I now use 3lb on most of my rods, but 2lb on my bluegill rod. This line is even more subtle than the micro ice, its super smooth.. develops no curls or kinks at all (not even over the summer!), and its a co-poly so it does not absorb water as quickly as the others. It really is an amazing line. I use the micro ice right into spring for tossing and vertical jigging micro jigs for big crappie.
I just bought some bionic ice line to try, but I doubt it will be as good as the sufix.