At the end, I got the Bridgestone Blizzak WS80 (installed them today). I hope they last a long time.
At the store, I was comparing the winter tires while I was waiting. All winter tires feel the same (at the touch), very soft and grippy. The new Blizzak is the same. The blocks on the thread do not seem to be very aggressive like other tires. Blocks are pretty much squares on the side, then diamonds, then triangles on the center.
EDIT: I mentioned the blocks because I read the following marketing material when I was reading the reviews, the new blocks increase grip by 10%:
"The WS80 has smaller shoulder blocks, which increases the biting edges of the blocks by 20% as well as increasing lug channels. Bridgestone says that this increases overall grip by 10%. The shoulder blocks have a small sipe running parallel to the tire that is 3D-cut to improve lateral stability."
Once I got them in the car, these Blizzaks feel exceptionally firm. Usually winter tires have a softer side wall, or at least that is what I am used to. These tires feel pretty damn hard. I am no expert, but I am assuming that was the point, it is the build design of the carcass / sidewall. Over bumps they feel more "thud-ie" than the OEM 4-seasons tires that came with the car (Toyo Proxes A18 ). Huge difference in grip on a day like today (wet and cold). Noise seem to be very, very low for a winter tire, I pray to God it stays like that, the Mazda5 is a little bit loud, I do not need any additional sound effects. The handling seems to be really good.
The are the first Blizzaks I ever get, before these I had Michelins Ices, so that's my point of comparison