Tattle's fun sometimes. But it's not really comparable. It's a celeb gossip site whereas MN is more like an all-aspects-of-life-as-a-female site.
MN can be brutal at times but posters also tend to strive for honesty. Tattle is more of a hugbox.
For example. If someone posted "My partner cheated on me and I've been going through a rough time and gained 4 stone from comfort eating, I feel dreadful about myself", Tattle would be like "Oooooh you're beautiful just the way you are!! Lots of heart and hug emojis!" whereas MN would be like "You need to confront your partner. Are there children involved? And here's some tips to get your eating issues under control. Binge eating can have dangerous effects."
The former response might make me feel better in the moment but the latter responses are more helpful long term.