Andrew Clarke wrote an answer about La Sportiva Solution Vibram XS Grip2 Climbing Shoe on April 2, 2013
I also wear a US 9.5 in the Shaman. I wear a 39.5 in the Miura VS and the 39.5s were just too painful in the Solutions (the Miuras were also painful before breaking in and still hurt a bit before I warm them up, but not as much as the Solutions). However, I never climbed in the Solutions, and they might have stretched out. Size 40 seemed to fit best (tight but likely would break in to fit perfectly) in the Solutions. (Also, my street shoe is a 9.5).