Elaborate on more differences

[xeruf]

The scoring here seems indeed better, solving my longstanding issue in fzf: https://github.com/junegunn/fzf/issues/2285

But the intention definitely seems to be simplicity: No previews, custom bindings or captive mode - some of these I have grown to love. Focus on performance.

Please highlight this in the readme - what it is, what it isn't, and what simply is not implemented yet.