I've got my '37s on today after wearing my '44s for a month. Man, what a difference in fit. The '37s feel huge in the thigh and leg compared to the '44s, while the '44s are bigger at the waist. I knew all this from the get go, but after spending a month in each pair, the differences become really dramatic.
At first I thought they were the exact same denim, but now the '37s feel lighter in weight, and the '44s certainly feel stiffer. Not that either pair is really wearing much (since I basically only wear them back and forth to work, and maybe out in the evening once a week) but the '37s are wrinkeling and wearing at the finish easier than the '44s.
~Swing