Just finished Syberia.
It wasn't as good as I anticipated after all your glorifications. I kinda missed motivation as in general lawyers are very liked among people (maybe i am missing empathy) and it also was a bit slower with lots of passive screens without ability to skip moving between them.
So the Longest Journey remains better.
But in general it is one of the best adventures. As the Longest Journey would be 9/10, this would be 7/10. But only because of not being all that my style.