Brayton cycle: It is open cycle.

Rankine cycle: It's close cycle.

Brayton cycle: Mostly used in gas turbine engine.

Rankine cycle: Mostly used in power generation plant.

Brayton cycle: Resemble less to Carnot cycle.

Rankine cycle: Resemble is more to Carnot cycle.

The heat addition and rejection processes in otto cycle are of constant volume, whereas in brayton cycle, they are of constant pressure.

diesel cycle is not called constant pressure cycle

constant pressure cycle is Brayton cycle and there is hell of a difference with diesel cycle.

you surely misunderstood the question man

Gas turbine engines and airbreathing jet engines use the Brayton Cycle.

by increasing the turbine inlet gas temperature