Diifferences between Computer organization and Computer Architecture: 

Computer organization:

• Computer organization deals with the physical component of computer system that interacts with each other to perform various functionality

• Computer organization is implementation of its architecture.

• Organization changes with changing technology.

• Example of organizational attributes includes hardware details transparent to the programmer such as control signal and peripheral.

Computer Architecture: 

• Computer Architecture refers to set of attributes that are visible to the programmer or developer. 
• Computer Architecture is more about design construction that may lead to better performance of the system.

• Computer Architecture describes what the computer does.

• Computer Architecture comes before organization. It’s like building the design and architecture of the house which takes maximum time

•  Particular computer architecture may span over many years and can have number of different computer models.