The facts are:
On Mars atmosphere pressure is way much lower than on Earth.
To hover hovercraft blows air under itself to create air cushion. This air cushion as I understand must have enough pressure to lift hovercraft and in the same time this pressure must be higher than atmosphere pressure to create lifting force.
My specific question is: given the pressure on Mars and on Earth will the same model of hovercraft need more or less "engine power" to be lifted than on Earth? By engine power I mean power of air blowing engine not propulsion. I'm deducing that less engine power than on Earth but please give some calculation example. Also please correct if I made any mistake above:).