Mars Exploration Videos -variation of landing-

I found an interesting video.

This video is the animation from launch to landing of Mars Exploration Rover (MER).

The particularly important point is the landing of MER. It blew up air bags at landing. It bounced at several times after collision with the land.

I have already heard how MER landed on the land. But, I haven't seen the animation yet.

On the other hand, Phoenix Mars Lander jeted to the land at the landing.
There are various methods to land.
Which method is efficient?

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