Based on the JS Framework Benchmarks (so caveats apply), an app built with lit-html (i.e. just the HTML templating part, as I understand it) is about the same size as SolidJS, and an app built with lit (i.e. the full framework) is about the same size as Svelte or Preact, and at a similar order of magnitude to Vue or Mithril.

So at least in terms of minimal bases, all of these frameworks are much of a muchness.