I used both yew and seed, but the svg support is lacking. Both framework don't render svg elements correctly. As I'm the author of svgbob[0], which heavily uses svg. I wasn't satisfied with both of the frameworks, So I created sauron web framework and I was quite happy with the result. Not only I can do an server side rendering for svgbob[0], I can also write a text-editor[1] with it and achieve a ~15ms typing latency.
[0]: https://ivanceras.github.io/svgbob-editor/ [1]: https://ivanceras.github.io/ultron/