compare photosynthesis and cellular respiration

Photosynthesis: The conversion of light and energy to chemical energy that is stored in glucose or other organic compounds. It occurs in plants,algae, and certain prokaryotes.
Cellular Respiration: The most prevalent and efficient catabolic pathway for the production of ATP, in which oxygen is consumed as a reactant along with the organic fuel.
What are the similarities?: They both take place within an organelle. They both involve electron transport chains. They also utilize ATP for energy. Most importantly they provide power for cellular activity.

Differences?: In cellular respiration it depends on oxygen as a substrate. In Photosynthesis it uses 2 electron transport chains. In Photo, energy is provided by photons whereas in cellular respiration the energy is provided by a catabolic process. Photosynthesis produces NADPH and Cellular respiration involves NADH and FADH2.