A321neo's:
Airbus MSN 11708 made its first test flight as Airbus D-AZXF on the 19th. The fleet website indicates this frame is expected to be N14507. However, both the 'Aviation Flights' and the 'Airbus Hamburg Finkenwerder News' have this frame tagged as N14504:
https://aviation.flights/aib/A320/11708
https://xfw-spotter.blogspot.com/search?q=11708
Now I'm curious which one it will really be!

(I need to get a life...)