1. Heavy weight components are always Rectangle in shape
while light weight may or may not.

2. Heavy weight components borrows the native screen to
paint their components while light weight render their
components by their own screen painting APIs.

3. They differ from z-indexing to each other, heavy weight
components are always displayed at the top of all
lightweight components.

4. Light weight components are faster in response and
performance.

2, light weight components borrows the native screen to
paint their components while Heavy weight render their
components by their own screen painting APIs.