Well Colin, Ice is ice, but if there's a layer of snow on top of that ice, it'll be very crunchy feeling at -40.
And please don't attempt to sign your name in the snow at -40, leave that to us experts.
There is a glacier just 30 miles south of Anchorage (Portage Glacier), and we would stop there on our road trips to fill our igloo cooler with glacier ice. It's so dense that it last much, much longer that common ice. It's a pretty Blue color too.