What is the difference between Assassins Creed 2 and Assassins Creed bloodline

Assassins Creed Bloodlines is 5 weeks after Assassins Creed 1. This is what happened to Altair before he dies.
Assassins Creed 2 is a completely different thing. The main story is the same but the story of the main characters, Altair and Ezio, are very different.
Assassins Creed Bloodlines does not have the Animus in it as much as Assassins Creed 1 & 2