They're different. For starters, React Native developers are writing JavaScript. Litho is a Java framework. The primary benefit of Litho is performance, whereas React Native is focused on developer speed.

I would ask, may Litho be used by react-native?

Both React Native and Litho use Yoga[0] under the hood for layout, so there are already some shared underlying parts. I'm not familiar enough for RN in practice to say whether you could plug Litho Components into RN apps.

[0] https://facebook.github.io/yoga/

Just wanted to nudge you to ask if you would have a look at my above comment on this thread.

Were you by chance on this project, or know of how I can get in touch with somebody who oversees things like this?

You can easily plug any native components into react native apps.