Split-adjustable, contoured design that maximizes comfort and boosts productivity. Mechanical switches, onboard programmability and more. Available Bluetooth and ZMK open-source firmware.
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.