On YouTube they edited in ads and censored some swearwords, but they are very similar. The pay version of the final episode is actually still fucked up on the website so the YouTube version is the better one in that case.
The biggest thing is the extra content for a lot of the episodes that's not available on YouTube at all, but it is also not the most compelling stuff but it has interesting moments.
There are torrents out there so I'd recommend doing that if you are interested in the extras and uncensored episodes.