These would be my concerns about potential differences between Signal and an 'Easy XMPP' client; would someone who knows Signal say whether these are accurate?: * Signal users are not anonymous; Signal requires users' phone numbers. * Signal is centralized. Is there a way to run your own Signal server? * Signal uses Google Chrome on the desktop (and Android?) and Google Play Services (or some part of them) on Android…
It's XMPP based and offers many Signal-like features. Seems very similar to the goals of this.