the Seahawk had the better radar.
I don't doubt this at all, although it should be acknowledged that the RN's radar, Sea Spray, was already a little aged when Lynx HAS1 entered service. Not overly so, and a significant modification package was completed by the late 80s. Obvious upgrades were 360 degree scan and the Control Indicator. Also, minimum range. A particular limitation was the ability to only display lock to +/- 87 deg. You couldn't fire and turn away. But the RN didn't proceed. Many of the other users did. We (RN) had more Sea Sprays than the others put together, so funded most development, which they benefited from while we lagged behind having done all the work. The Netherlands, in particular, took up the best improvements, and after one exercise in the late 80s MoD had to quietly hand back a few Dutch transmitters that had found their way into HMS Arrow's stores. Really, if you're going to 'swap' them, make sure you change the ident plates and de-mod them before returning them for repair.
Configuration control was fraught. The original spec had a different magnetron. Once replaced/upgraded, accidentally fitting an original Control Indicator would result in much smoke. This was exacerbated by the tube manufacturer announcing it was being sold to the US, and a frantic search for another. Not easy given it was TS. Same tube in Blue Fox, which was not widely appreciated. Two front line fleets would have been useless within months. Bofors saved the day. But the general quality of the Sea Spray family of radars has been proven and persists.