Are these Giant bikes fake?
The paint scheme looks like that of the 2009 Giant Defy Advanced 1
Check out https://www.bicyclebluebook.com/value-guide/product/3050124/
bikepedia.com and bicylebluebook.com have lots of info on bikes by year and model.
Here's the 2010 Giant Defy 1, which again looks very similar, with a few minor differences in the paint scheme: https://www.bicyclebluebook.com/value-guide/product/19422/