How will a laser ignition system compare to diesel combustion system, aka the current most thermodynamically efficient engine?

How is laser based car ignition compare to a diesel combustion system, aka..the current most thermodynamically efficient engine, refined over decades of years of tuning and experience?

Current exhaust driven variable geometry turbos can vary turbine swallowing capacity to change compressor speed independant of engine speed I believe so transient response
should be improved over a conventional fixed turbo. This supercharger-CVT setup is doing essentially the same but robbing engine power. Correct me if I'm wrong.