I just got back from Rome and Florence, both wonderful visits.
I was struck by the affordability of the Zegna boutique. Shirts easily 50% off versus US stores. I picked up two Trofeo shirts that were beautiful and I'm not normally a Zegna guy. They seem to have stepped up their game. Customer service was five star.
Loro Piana had some amazing stuff but best I could tell it was more modest of a discount, say 25% off, maybe 30% on some items when VAT returned.