Okay in that case, what I would ask is;
Would you consider passive Health Regen of a monster that counteracts the HP drain of extreme cold to be "Resistance to Extreme Cold"? Or would you just keep it as is, you know, being "Regeneration"?
Because technically, if AH gets resistance to extreme cold through simple Spatial Resource conversion, then Kirito must get it too, as he created a shield from Spatial Resources to protect himself, as well as Alice and Asuna from the same HP drain of cold.
There isn't much I can say on the matter, as it's a decision better made by people who know the classifications here to decide where it should fall.