What's the difference between window lines and no window lines on external walls?

There are differences between them in decoration effect, heat preservation effect and construction difficulty.

1, the decorative effect is different. The window line of the external wall can increase the aesthetics of the external wall, but without the window line, there is no such effect.

2, the heat preservation effect is different. Exterior wall window lines can play the role of heat preservation, but without window lines, there is no such role.

3. The construction difficulty is different. The installation of window frames should be considered in the construction of exterior walls with window lines, but not for exterior walls without window lines, so the construction of exterior walls without window lines is relatively simple.