This is something I am horrible at.
Realize that in your writing, whether the written word or audio, you have a voice. Escaping that void is possible, but you should not be ashamed if you cannot.
It was my pleasure recording with the ~4 bands I did. I may have had a drumming “style”, but I was never boxed in by the constant repetition of one writer. That is not a bad thing, but from a drummers perspective, it can be a bit hard to grow as an artist. The coolest dichotomy that I saw was Livestalk v ACU. It was the same writer, but he was not constrained by the “punk/metal” sound we cultivated in ACU. He had taken down all constraints and, therefore, was able to flex his creative sound.
That is not even delving into his creative contribution to Slender Loris. They will probably remain one of my favourite punk bands for the rest of my life.
Voice is more personal when it comes to writing. I have read back most of my works recently. I was taken back by how similar they all felt initially. It was not until I looked at them from objectively that I noticed how different they are.
You can be too close to appreciate the things you have done. When your style is a certain way, it is easy to write-off projects as “the same”, resulting in spiraling and not producing any further.
Accept that you may have a tone or “voice” in everything you do. It doesn’t make anything new too similar to what you did prior. Look at the narrative. There is a difference between those two projects, and a successful tone should not dissuade you from doing something.
Yes, it is possible to leave your comfort zone. It is possible to create works leaving behind atribute that you have relied on forever. It could be neat! This does NOT mean your old works are shit.
Don’t beat yourself up.
Don’t hate what you do if it brings you happiness today.