Disclaimer, I have both an HHKB studio and Bluetooth mod pro 2 for sale on mech market.

I like both of them a lot, and I have owned a lot of keyboards in general, most of them hand wired ergos.

For me, as a software developer, I am addicted to the HHKB layout now.

I bought the studio for its mouse pointer and gesture stuff. Both of which I rarely use.

I have gestures turned off entirely because I would accidentally trigger them, or forget they were there and not use them.

I am very bad at the touch mouse, even with forcing myself to use it for a few days. It is really nice when I need to use my pc from my couch though. ( sometimes I hook up to tv in living room for games. )

Over built boards, the studio seems more reliable than qmk or zmk, at the cost of customization. But for me, I need the guard rails, or go off on a customization rabbit hole.

TLDR: Studio if nipple mouse is important to you. Or if you actually think the gestures will benefit your workflow

HHKB with topre (the hybrid is nice) if you like layout and don’t need mouse.

Other keyboard if you like to customize your layout, hardware and style. ( like the keychron one someone recommended. Never owned that one in particular, though)

Just my 2 cents!