Unfortunately, I have returned the suits because their color/pattern were too off from what I saw on screen (Yoox is totally unreliable for detailed suit fabrics). However, the amount of detail and handiwork was excellent-- they seemed to be of SDP level, even though they are just labeled "caruso." However, these are the new, recent labels, which I heard now includes all lines without a separate line for the distinguished RCSDP (Hence the price increase in the batch of suits). Someone may be able to confirm this. One of the suits I purchased was definately spring-summer wool whereas some others were four-season. None were Fall-Winter fabrics. Fabric quality seemed nice, but I didn't look too carefully because they were not the type I wanted. They were highly wrinkle-resistant for their weight and looked fine. The Caruso suits on Yoox are divided in three different cuts, if you didn't see that already. Once I had them in hand it was very obvious.
Hope that helps at least a little.