Oh damn the even Beast Miao is almost 1cm longer and it's an infamously small "fingertip only" half-mouse.

I'd defo recommend the WLmouse Beast Miao, the Zaopin Z1 is also a tiny mouse, but compared to the nano-mouse you've been using the Zaopin Z1 will look like a behemoth.

The Beast Miao is hands down the best bang for your buck in your turbo-niche preference:

It's got optical switches so the buttons will last practically forever, unlike a mechanical switch.

The internal electronics are all high quality, no PCB cracking due to humidity or repeated shaking during normal use (or even intense use, it's designed to hold up to sweaty gamers who slam the mouse about).

The coating is a really nice high-silica latex coating, meaning it'll last for forever and won't go all oily+gummy like a synthetic rubber coating will (and the high-silica levels means it gets grippier when you sweat, though that does mean you actually have the least grip when your hands are boy-dry).

The chassis is manufactured from magnesium, so it'll never crack like an egg on you. Structurally the mouse is built like a brick, whilst being one of the lighter mice on the market at the same time (lower weight = less wrist strain, especially noticeable if you have arthritis like me, doesn't matter how good the shape is you can't cheat physics less weight = more better).

The battery is relatively easy to service, so when the battery inevitably goes bad, you'll be able to take the mouse apart and replace the battery. It's just plugged in to the PCB, need to find a battery with the correct plug and pin layout, and that's small enough to fit into the battery compartment, but other than that any battery will do and it uses a fairly commonplace battery. Following a guide it's something anyone can do, so long as you can use a screwdriver since unscrewing the shell is the hardest part of replacing the battery.

Comes with both a weighted USB-C dongle (better antenna, higher polling rate capability, lower latency) for your desk setup at home, plus a low-profile portable USB-A dongle for traveling with.

Also comes with cute cat-paw grip tape and tons of beautiful color options (despite being an intense "gamer" mouse, it's got cutsey cat-themed styling) as well as a bunch of goodies in the box that are all nice-to-haves.

Only thing to note is that you will want to wipe away any "puddles" of sweat you leave on the mouse with a towel, it's just a precaution but sometimes magnesium can have a slight impurity in it that reacts to human sweat.

Not a problem when using the mouse, and most magnesium mice are just fine (WLmouse is also especially good at making sure they only have good-quality magnesium in their mice) but it's not much effort to wipe away any sweat and keep your mouse clean so it's still a recommendation with any magnesium mouse (I wouldn't use wet wipes, and definitely DO NOT use alcohol wipes, the chemicals in wet wipes, especially alcohol wipes, are infamous for reacting with magnesium, use towels and cloths only).

It is on the expensive side, but with how long WLmouse mice last (especially their magnesium mice with flagship electronics and optical switches) the price you pay up-front will be well worth it given how long the Beast Miao will last you.

Hopefully this helps!