War Over Dust by Stuart Aken is the second in his Generation Mars series, and sequel to Blood Red Dust.
The Chosen and their offspring enjoy an atheist democracy where justice, peace and harmony are served by an advanced technology that controls almost all daily life. The citizens of Marzero slave under the power-mad and greedy Elite, whose only concerns are personal gratification and profit. When citizen Gabriel, who believes he is the voice of God, meets Daisa, a brilliant but innocent student of humanity, will their differences bring conflict to the newly colonised Mars? Or can their growing love help their communities coexist in peace before war totally wipes out one side?