Best squash shoe ever in my opinion, upgrade from the previous

This is my 3rd pair of Adidas Crazyflight shoes. The previous 2 pairs on a size 9 fit perfect. For some reason, on this version, they are a bit big. I ordered an 8.5, it was clearly too small. It seems like there is a full size (not a 1/2 size) difference between the 8.5 and 9. It makes me think the 9 is defective in sizing for this pair only. I still have my old ones, definitely a difference. Struggling with what to do as I do like the support of this shoe in general. I would like to try another 9 and hope if fits like it should based on the 8.5 and my old shoes, but I figure I return these and order another one, I would get these same shoes back. Not sure if shoes from the Adidas site are defective, this pair was defective or ???