I can confirm this too. Yes, adidas official conversion on their site is US 10 women is 9 men, but I have white pair in women size and for me 1.5 up women fits completely the same than men size (men US9 to women US10.5). I guess their conversion is just a suggestion and varies from model to model...
I also wrote an email to adidas about sizing... This is their reply:
"In general, the difference between men’s footwear and a women’s footwear is approximately 1.5 to 2 sizes. You can certainly use this information as a guide when purchasing your product, but it is not a guarantee.
This conversion however does not take into consideration other factors, like sole design, toe shape, arch height, width, etc. that are equally important to your overall fit and comfort. These types of elements can vary from one shoe to another, so we recommend trying on the pair you like whenever possible.
If sizing becomes an issue, we do offer free returns and free shipping on a reorder if a size change is necessary. Please contact our customer care line for assistance with this: Call us 7 days a week 8 AM to 11 PM Eastern Time All days: 1-800-982-9337"