End-to-end encryption means messages are encrypted on your device and decrypted only on the recipient's. The platform in the middle relays ciphertext it cannot read.
Specter Comms is end-to-end encrypted: Specter can't read your messages, so it has nothing to mine, sell, or surrender. It can't snitch on what it can't see.
"Trust us" vs "can't"
A privacy policy says a company won't read your messages. E2E encryption means it can't. One of these survives a change of management.