This immediately comes to mind as akin to the Signal vis-a-vis WhatsApp etc. Here there is an obvious reason to use Signal and a well-understood proposition. What might it be for Ladybird? And how will you differentiate?
That said, I do think we'll find ways to differentiate given our uncommon situation with no ties to the advertising industry. This gives us the ability to experiment with privacy measures more aggressive than others may be comfortable with for fear of losing funding, for example.
Our own approach to privacy is as radical as it gets in search: "No Tracking, Just Search". As we often say: tracking, not ads, is the fundamental problem. Contextual ads do not need necessarily to have tracking. Though the duopoly of search ad networks makes that a hard road too.
Good luck. Excited to see how Ladybird progresses.