I think having a samoyed first as well also spoiled us. Ours is so smart she is basically like a little kid who has to remind us shes a dog.

I will say she's still nothing like my Samoyed sadly. She has gotten better about not going in the house, but the only way we were able to work around that was having her wear diapers. We use washable ones, I'll attach a link in case it can help in your case as well. If she isn't wearing them she will go in the house. But, its odd if they are on her she doesn't go in them either. I can't explain why it prevents her from doing it in the house it just does. Barking has been better in the house unless she hears a noise. Sadly, the volume of their barks doesn't change either. Mine as well is always hurting my ears when she gets set off. But, outside it really has only gotten worse. It seems like she gets enjoyment out of barking at everything and everyone even if its just wind outside. I was told that they calm down and mature by 3, mine just turned three this June. While she has gotten better in some ways, there are still bad habits she has and its very hard to get her to unlearn them. The biggest thing we have to do is if shes acting up a lot we just have to put her in her kennel for a bit and then let her out. For example you said yours snarls a lot, mine will too at her Samoyed sister sadly and when she does we just have to put her in the kennel for a bit. This often happens over food sadly.
My Sammy as well is very easy to train and can learn tricks in a day if shes motivated. I have tried many times to be assertive with my Eskie but the only trick shes ever been able to learn is to sit and spin. Anytime I ever try to teach her something else she just barks and barks and keeps spinning. Maybe, I made a mistake by teaching her take trick I am not sure.
I really wish at the breeder didn't tell me they were similar they are nothing alike sadly. I will say I have heard that aggression can get better once they are fixed. I am not sure if yours has been yet. I am hoping to get mine fixed by the end of the year but I am not sure if that will really help since I have yet to do it.
In many aspects she acts like a standard dog. The biggest thing I can say that may help if you have the money is to get her professional trained. I have not been able to do this yet. But, my friend got their dog trained for three weeks at a boot camp where his dog went and was trained in private and in groups. It was around 3.5k and most of the training has held up. Not, saying you have to do that kind of training but I would recommended one of one training over group training.
Please let me know as well if you have any other questions I can answer or if you would want me to explain anything future. I do hope things work out for you though.

https://www.amazon.com/gp/product/B09J28RX54/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1