I havent driven my car in the snow yet, but I have noticed a difference in the dry with my upgraded front diff. When I personally emailed Albins, they were doing "custom" ratios for no extra charge, but it does take longer to get them of course.
Paul, not to sound like an a$$, but I dont think its biased at all. I drove my 20G with almost 350 AWHP (on 92OCT) for a little over 18K miles, hard shifts occasionally, a few hard launches and had just started to crack 3rd gear. But also look at people who have destroyed "built" transmissions, it was something foolish that most of the time could have been prevented.
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX