I liked it better too, which is why I'd suggest reading The Goldfinch first, and then Secret History will be even better than the one you just read. And then you still have The Little Friend to look forward to.
It's not getting a lot of love in this thread but personally I loved it. My one quibble (and it sounds more major than it is) is that the last 100 pages or so really needed much better editing. But I loved the rest of it so much that I forgave it.
I loved her other books as well, but this was so different from them, to me, that I don't think they can be compared.
I read the Goldfinch first and then read the Secret History. Honestly, I hated The Secret History. The Goldfinch was more balanced, though some aspects were overly contrived. Just as Tartt seemed to be overtly flaunting her Classics degree in The Secret History, she's a little heavy-handed with the art history in The Goldfinch. But she's definitely matured as a writer so it doesnt interfere with a compelling narrative, especially if you are a parent. Maybe if I had read The Secret History 20 years ago I would have a different opinion.
Thx!