The principal thing I noticed was just how much they all sounded like Pete Thomas. Pete also managed to make the Selmer S80 sound good, whereas when I play one of those I sound like I'm playing under a blanket.
I'll add I to my initial list - some of the mouthpieces don't quite seem to have the depth of sound of others, which I missed. Thanks for that Pete. I'm looking forward to the Soprano Mouthpiece Shootout in the New Year!