All terrestrial planets are different when it comes to their interaction with the solar wind.
For the Earth the interaction is dominated by the strong intrinsic magnetic field and the outer regions of the magnetosphere can be visualized as a supersonic magnetic cavity in the solar wind flow. Mercury has also a magnetic field that determines the interaction but the field is so weak that the planet fills most of its magnetosphere. Venus does not have a magnetic field and the interaction is dominated by the ionized upper atmosphere. These missions revealed the basic boundaries of different plasma regimes, e.g., the bow-shock, the magnetopause, the magnetospheric cavity, and a plasma tail. A boundary layer with a low energy component of presumably ionospheric origin was also observed near Mars.