@Keychat has NIP17 messages, while White Noise is MLS only. With NIP17 anyone who has your nsec sees all your messages. With MLS only the active device gets messages and with the nsec you don't get old messages. Hopefully Keychat and White Noise will be interoperable one day!

If we compare it like this, I’m not sure how to explain it. Users can use multiple IDs, including a microblog ID—the post below is intended for Nostr Microblog DMs.

This is a much better explanation of the difference!

Thanks

Both are honeypots that claim to offer privacy and security (I think one of them even mentions "end to end" encryption) while being mere downloadable apps

Thank you @White Noise @Keychat for the input. I have tried to highlight the differences in a long form post, feel free to correct the information there if required. Excellent work — really excited about the advancements in decentralized technology. Kudos.

Perhaps you might be interested in the note below. 👇

Doesn't Keychat use ecash 'blind signatures' stamps also? How's White Noise going to address spam on relays if only the group ID is known? Auth would reveal metadata and a different emphemeral key use used to sign each event? Blind signatures seem ideal here.