KEENMen's Targhee 2 Waterproof Hiking Shoes, Cascade Brown Golden Yellow, 39.5 EU

I'm going on a cruise, and want to know if these would be good for the slippery decks on cruise ships?

Some of the colors pictured are in the Mid size shoe. Are they really different styles, or are they simply showing available colors?

Can these be used during times especially for snow days?

I usually wear 11 wide, which size should i order?