I think the snow one would be cool, it would give the map a new feel from nexuiz. However, Taoki already did a snow version of the map for his game, so it's a bit of a toss up. He would probably be able to help you with some of the snow effects though.
EDIT: another quick note, we barely have any snow/winter themed maps, so thats something to consider as well.
EDIT: another quick note, we barely have any snow/winter themed maps, so thats something to consider as well.