It is possible to look at the coverage for a country on Ancestry's sites without having a World Subscription.
Go to any Ancestry site and on the top navigation bar, choose search. From the drop-down menu, choose Card Catalog. You can filter the results further by going to the menu on the left and choosing Europe, then Italy.
Click on each record collection -- for example, Como and Lecco, Lombardy, Italy, Civil Registration Records, 1866-1936 -- and then scroll down the page until you can see the sections called Source Information and About [title of database]. The source information will tell you when Ancestry put the records online, and where the original records can be found:
Ancestry.com. Como and Lecco, Lombardy, Italy, Civil Registration
Records, 1866-1936 [database on-line]. Provo, UT, USA: Ancestry.com
Operations Inc, 2008.
Original data: Lombardy Region, Italy, Civil
Registration Records, 1866-1936. Tribunale di Como, Como, Italy.
The About section describes the collection and says what kind of information you might find in the records.
By looking through the card catalog, users can see whether Ancestry has any records for the locality and time period needed before they pay for a subscription.
Other websites with genealogy records can be evaluated the same way -- look for a link that will show you a list of records for the site.