I've just tested and it seems all right to me. This version has the changes I've made on your site.
I have tried:
“Cesarini Sartori Rossobastardo” – got 1 result on both sites
“Ruffino Chianti Superiore” – no results on IT, because the DOCG category is excluded, and the product belongs there
“Antinori” – lots of products on both languages
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