We cannot introduce you to everything in one topic. You need to read more about all the threads here and read the experiences of others and that way you will know more about hearing aids.
The Phonak you have is a good hearing aid, I also wear phonak hearing aids. You must know that if you change the brand of hearing aid, it usually requires getting used to a new, different sound. Each brand has its own specific sound. For some people, it is a shock to change brands and get used to new changes.
There are some things that are universal in all hearing aids, but there are details that are not the same.
Phonak SKY is a bte hearing aid, bte is the designation for hearing aids that use a classic tube and mold. Otherwise, you can also use RIC hearing aids, they are more discreet and nicer compared to bte. But I think RIC is more expensive to maintain, receivers those small speakers I don’t know how in your country but usually you buy a new one if it breaks. and new receivers are not that cheap. In some countries it is free and in some countries it is paid because it is like a consumable part.
Ask about a Ric hearing aid like the Phonak Audeo Lumity or a future series to come.