This is for sure a very unique and original series that can't really be compared to anything else, which is very rare these days. It is very creepy and extremely weird, yet still likeable.
Art wise it's really just beautiful and I can't help but appreciate what the artists did there, you can tell how much work was put into every single prop, big or small.
As for the differences between the web series and the TV one - I think I'll be in the minority by saying that I actually liked it better than the original web version. While the web series had better songs in my opinion and was still overall good, the stories in the TV episodes felt way more collected together, while the web series often felt completely random and unclear and sometimes got a little lost in its own randomness (even though it was likely made that way on purpose). I personally think the TV one has a better balance of some randomness but still not so much that you don't even understand what happens. The stories in each TV episode also manage to get more deep thanks to them being longer. It is a matter of personal preferences though, as the web version did leave more things to your own interpretation which some people might prefer, while the TV one doesn't require you to stop and ask yourself what have you just watched, or at least not to the same level as the web one, so it is slightly less mysterious in a way. But nonetheless, the TV one is still very weird like the original so they are not totally different outside of the point I mentioned.
The only downside I would say is I think it would have been nicer if the stories developed more from one episode to another, like some main deeper storylines that will make you look forward to see what will happen in the next episode. So far (first season) it didn't really happen, except for just a tiny bit in the last episode. If there will be a second season, hopefully it would happen there.
Art wise it's really just beautiful and I can't help but appreciate what the artists did there, you can tell how much work was put into every single prop, big or small.
As for the differences between the web series and the TV one - I think I'll be in the minority by saying that I actually liked it better than the original web version. While the web series had better songs in my opinion and was still overall good, the stories in the TV episodes felt way more collected together, while the web series often felt completely random and unclear and sometimes got a little lost in its own randomness (even though it was likely made that way on purpose). I personally think the TV one has a better balance of some randomness but still not so much that you don't even understand what happens. The stories in each TV episode also manage to get more deep thanks to them being longer. It is a matter of personal preferences though, as the web version did leave more things to your own interpretation which some people might prefer, while the TV one doesn't require you to stop and ask yourself what have you just watched, or at least not to the same level as the web one, so it is slightly less mysterious in a way. But nonetheless, the TV one is still very weird like the original so they are not totally different outside of the point I mentioned.
The only downside I would say is I think it would have been nicer if the stories developed more from one episode to another, like some main deeper storylines that will make you look forward to see what will happen in the next episode. So far (first season) it didn't really happen, except for just a tiny bit in the last episode. If there will be a second season, hopefully it would happen there.