Looking forward to picking up one of these next week. I love both my IH-634-S (21oz) and my 18oz vintage Stormrider jacket, so this should be good!

How does the amount of stretch (especially in the waist) of the 18oz Vintage denim compare to the 21oz. denim? Is is more or less the same (1 inch)? According to both product pages (IH-634S and IH-634S-18) it says 1 inch. But maybe someone has a direct comparison. Of course I will check the size chart, but I might be in between sizes (W35/W36).