Tenor sax necks - Selmer mark VI neck and Eastern music hand hammered copper neck. 

For best results use headphones to listen to this.
Here is an unedited raw late at night recorded comparison of 2 tenor saxophone necks.
1. Selmer Mark VI neck (silver plated but almost all the plating has gone)
2. Eastern music hand hammered copper neck.
This is not a competition but I understand if people have favourites and it is more about hearing and feeling the differences.