New one
 

Looking for the goods and bads... recommandations on this 2 bike models... Anyone can help?

Cannondale Habit 4 (2018) or Giant Trance 3 (2019)

Thanks in advance

Both excellent bikes, can't go wrong with either. I personally like the feel of the Trance a little better, but that is just personal. The 2018 Habit 4 will have higher level components than the 2019 Trance 3, and I think the fork is a little better on the Habit, and 1x11 on the Habit is preferable to the 1x10 on the Trance. Retail price for the Habit 4 was about $900 more than the Trance 3. The comparable Trance is the Trance 2.
I would take the Trance 2 over the Habit 4, but the Habit 4 over the Trance 3.