Why the Royal Navy valued American carrier fighters

Which American aircraft did the Royal Navy consider better than its own equipment?

The Wildcat and Hellcat were well regarded, and Eric Brown was a notable advocate of the American fighters.

The Royal Navy liked the American carrier aircraft it received, particularly the Wildcat and Hellcat. These fighters were not treated as unwanted substitutes for British types. Test pilot Eric 'Winkle' Brown was an especially enthusiastic admirer of the Grumman 'cats.' His example shows that British evaluation could be strongly favorable even when the equipment originated outside the domestic aircraft industry.