The winter tires are marked by the mountain symbol with the snow flake.
How to recognize a true winter tire | Goodyear
You mean true winter tires vs AT with the snowflake symbol. As someone said earlier, an AT will be just as good possibly better in deep snow. However, the winter tire will be better in typical urban conditions and much better on ice. It is ice where the AT with the snowflake won't cut it. But ice is ice.... True winter tires are too soft to be run at non-winter temperatures.
Unlike what the previous poster said, if you plan on ANY offroading, you will definitely want a proper, matching spare if you run any AT tire other than 3-ply sidewall LT-D or E KO2. With that, you could get away with the factory spare. And there is absolutely nothing wrong with the factory location.
If in doubt, it is hard to go wrong with the cheapest good tire, which the Wildpeak AT3W. Looks like the Grabber ATX may be equivalent but there is lots more feedback on the Wildpeak. The Ultraterrain are overpriced and it is unacceptable in my opinion for a new design tire to come with a B traction rating (B on temperature is a given on an AT in this size so that's fine).