From what I've seen of their recommendation algorithm, it's actually better that Goodreads's as well. The only issue being it seems to aggregate what you put in as your mood and preferences as well as what you've read, whereas on Goodreads you can filter by 'shelf' (which is usually horrible, but a feature I'd love to have on StoryGraph)
It's early days, but it's neat and clean and it feels the opposite of Goodreads' everything-for-everyone-at-once-all-the-time approach.