Normally a GaN based T/R (transmit/receive) module is a lot more effcient than a GaAs based T/R module. Also GaN based transistors can generate 5 to 8 times more power.Everyone says GaN based aesa radar are at least 50 percent effective than GaAs based ones,but our officals says”slightly better”,what does it mean?Are the TR modules reduced?

What’s The Difference Between GaAs And GaN RF Power Amplifiers?
This article discusses the pros and cons of GaAs vs. GaN semiconductors for RF power amplifiers.
But in an Aesa radar it is also important how well the ancillary electronics and circuits are employed. For a similar number of T/R modules you may get a very good result from GaAs modules if your design philosophy is good and you use top notch equipment. With a comparatively larger number of modules you may even be on par with a GaN moduled radar.
So without testing the GaN based Murad Radar in actual test conditions and also not letting the specifics known to outside world too much, it is better not to throw caution to the wind and let secrets out.