BaE did not build the APG-81 and they are not comparable as radars.
The AN/APG-81 offers superior multirole functionality with air-to-air, air-to-ground, and electronic warfare capabilities, integrated deeply into the F-35’s stealth and sensor fusion systems. It is optimized for long-range detection, ground targeting, and low probability of intercept, making it ideal for first-look, first-shot engagements in networked, stealth-driven combat environments. It is also capable of acting as Jammer, communications hub and so on.
The ECRS, particularly in its Mk3 variant, focuses more on air superiority and modular upgrades for multirole combat. While it improves the Typhoon’s ground attack and electronic warfare capabilities, it’s tailored for high-performance air-to-air engagements with a flexible, future-proof design.
While the F-35’s radar is a part of a larger, highly integrated system for complex operations, the Eurofighter’s radar is focused on strong air dominance with evolving multirole functionality.
The F-35 with VLO will always have first shot capability