3 differences

1. Ps is more for changing up your image (like adding, removing objects) while makes things look better.
2. Ps has more tools to work with and Lr has less which can be good or bad depending.
3. Lr is more organized. You can albums for different projects.

3 similarities

1. Both can edit images.
2. Both have similar UI’s. Tools on the side that break into other similar tools. File tools in the top.
3. Both can use RAW files.