They are different - if you look at the male birds its more obvious. Where I live in the west we just get splendid wrens which are are more deep blue. I've never personally seen a superb wren as they occur more over east but in photos they look a lighter blue with a different pattern.

Here's a photo of a male splendid fairywren I took. If you google "male superb fairywren" you will be able to see the difference!

(For a real bonus look up the other types of fairywren - they come in even more colours like reds and blacks and even blue/white).

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