In the snow, I'll take a Tucson with "all season" Michelin Defenders (wife's car) driven safely over a Subaru with Blizzaks (my car) driven aggressively.
The reality is that this cannot be over-stressed: physics will always win.
Safe driving - allowing for sufficient braking/reactionary distance as well as modifying one's acceleration/deceleration habits - should be given extra attention in adverse conditions, regardless of what one's wheels are skinned with.
The Click and Clack Tappet Brothers coined the word "Subris" to describe those hoonin' Subaru drivers off in the ditch in snowstorms. Every time I think about hoonin', I remember their voices and their laughter, and I think better of it.
I know we're all adults here, and we can make our own decisions, but for those who are a little curious ( or maybe recently moved to a new area, and don't know what the weather is like year round), here is a link to a map from tire rack that gives some suggestions as to what kind of tires to use in what geographical areas. As mentioned above, it's good to consider that any tire is a trade-off, so what you gain in bad weather traction, you might lose a little bit in warmer weather.
^ That map and its recommendations, I think, actually makes decent sense!
It's rare when my opinion and that of retailers align......

That said, the graphic actually serves as an excellent jumping-off point for yet another lesson for those who are shopping for winter tires: note that the picture does not specify what type of winter tires the customer should purchase.
Folks should realize that this can impact their driving tremendously - perhaps just as much as their initial decision to go with an "All Season," "All Weather," or winter tire.
Don't just head into a tire shop or hit that "purchase now" button online on any winter tire. Nor should you take a brand-name such as "Blizzak" as your frame-of-reference.
Realize that there are several different types (sub-genres, if you will) of winter tires:
- "Performance Winter"
- "Studless Ice & Snow"
- studdable winter
...and that for any given brand (i.e. Bridgestone) whose winter tires may be marketed under a specific name (i.e. Blizzak), that "name" may cover several different sub-genres - or even ALL sub-genres.
For example, the Blizzak line of winter tires made by Bridgestone covers everything from passenger vehicle fitment "Performance Winters" and "Studless Ice & Snow" tires all the way to SUV/LT fitments of the same. Some manufacturers have distinct names and/or product prefixes/suffixes for their various offerings....others, not so much, and heading into a store and just asking for, say, "Blizzaks" would be akin to walking into Baskin Robins and asking for "some ice cream."
Finally, don't let any salesperson corner you into a winter tire sub-genre decision without first having made certain with you your driving habits and mobility desires.
Those of us who live in areas with notable winter precipitation typically understands that your precise location within even a rather small geographic area can dictate whether you'll have 50 versus 100+ inches of snow per season. Alternatively, some who live in more coastal areas can see more ice, whereas those inland more powder, etc. Make sure that your salesperson understands the
actual winter conditions of where you live, instead of what he/she
thinks your area is like (less likely at a local brick-and-mortar, but very common when dealing online).
Similarly, make sure that you factor in your actual driving conditions, like
Justin.Poe noted - to include when and how you may see municipal street grooming/clearance.