This mad man had the courage to present BOA a rust project at JS Conf. The project had it's spotlight taken by Bun and Deno. I also think the project was progressing pretty slowly from what people were expecting.
Well the first two are runtimes built on top of JavaScriptCore and V8, respectively. So we're definitely in a different space.
QuickJS/QuickJS-NG might be a better comparison, but I think they are limited in specification conformance or at least selective in specification conformance in favor of remaining in a single file and fast. For instance, I'm not entirely sure whether they will be supporting Temporal once it goes Stage 4 because of the size of the feature, and I don't think they support Intl. But I also can't speak for QuickJS.