I guess for me the biggest difference compared to a Charybdis is that it’s a professional product.
I love the Charybdis as a project, but due to the price, I would rather go for something that can resist the test of time.
I personally ended up getting the Glove80.
I don’t have experience with the Advantage 360, but there are some reviews of people who have used both and compared them.
Like this and this.
There’s also the Svalboard, although it might be a step too far for you. It has options for integrated trackballs / trackpoints.
Glove80
Looks great! How long have you been using it? Are you happy so far?
Been using it over a year and loved it from the beginning.
Wrote a bit more about it in this comment https://lemmy.dbzer0.com/comment/11566566
It’s also designed with custom mounts in mind, so you can really adjust it to what you prefer.
Just found this comparison, looks nice