The bigger the virtual dom the larger the performance gap is supposed to be. But, true, would like to see some benchmarks from the real world, i.e rewrites and such.
Perhaps not a great comparison, but here are the Svelte and Vue HackerNews feeds. Not a great deal of difference, but perhaps it's too simple for performance to really matter.
https://hn.svelte.dev/top/1
https://vue-hn.herokuapp.com/top
Edit This site says the Svelte one wins on load times: https://hnpwa.com/