Complex sentence: The ROHINI has a more advanced Indian developed antenna in terms of power handling and beamforming technology compared to the original 3D CAR while the REVATHI adds two axis stabilisation for operation in naval conditions, as well as extra naval modes.
Split into simpler sentences: The ROHINI has a new Indian developed antenna which is more advanced than that on the original CAR terms of power handling and beamforming technology. The REVATHI adds two axis stabilisation for operation in naval conditions, as well as extra naval modes.