Considered it, but decided to stick with recommended positioning.  In retrospect, it doesn't seem like it would have made much difference based on the shape of the HS3's, but I couldn't say for sure without trying both.  The HS3s also have the snowflake symbol, but clearly aren't as winter oriented as XDS2s.  I may get XDS2s for the front if I feel I need them, but I will regret not having been able to put a couple thousand miles on them in the summer to get them a bit more compliant.  But hey!  I guess I could put the rear tires on the front at that point!