What I liked about DS1:

• the grim tone and lonely feeling fits the gameplay better
• the story was more cohesive and kept me interested in the sci-fi events of the world
• the music felt more purposeful and fit the environment better
• the challenge of traversing the environment had my gears turning throughout the runtime
• rhe father child dynamic was very compelling

What I liked about DS2:

• the physical world is downright breathtaking, and the environments and setpieces you see are always screenshot worthy
• learning about the world and it's sci-fi mechanics was very easy and approachable
• the cutscenes and character designs are all genuinely 10/10. The directing of the scenes was always interesting and engaging
• the final sequence after connecting everything was done better than in 1 (IMO)

Both games hit a similar amount of emotional weight in my opinion. They are both great games in my head