A quick question for all the Yooxers out there--I'm an EU 42 and a US 9.5. Yoox pegs EU 42 as US 9 (and, confusingly, EU 41 as US 8, EU 40 as US 7, etc.)--should I believe the US or Italian sizes? Does it vary depending on the shoe that I want to get? The site doesn't provide much guidance.