the logitech g304x debuted in china & is around the corner. it should crush the mchose g3 (v2) and attack shark g3(pro) in every capacity given that neither of the clone brands are using their “ice feel coating” and are using cheaper MCUs + capped at 1khz polling rate (excluding the mchose g3 ultra, but it’s no longer under production & has issues anyway).
to clarify, i have 2 mchose g3 ultras but they kept dealing with cursor stalling problems on every surface, lod, power setting combination possible.
if you can’t wait in the meantime, i can vouch for the attack shark g3pro (white or pink) in spite of its 3311 sensor & budget MCU.
i have an mchose g3 v2 pro on the way and can report back on that.
if you’re looking for small form factor shapes that have similar ergonomic decisions but aren’t necessarily g305 clones:
the attack shark r6 is a minified ninjutso sora v1 with solid build quality & coating (white). you will need to download their latest firmware on the attack shark discord & use the web driver for the attack shark r5 to properly configure it, as the stock firmware has power issues that can cause clicks to be held & the sensor to stutter, and you may need to toggle the power switch on the mouse after you plug in the receiver to fix some sort of wireless signal failure/stuttering. if you can deal with that, the performance is great & the shape may be endgame if you're looking for more directed rear hump support than a g305, more of a back flare for your pinky to rest on, and in which the front of the mouse is tucked in/slanted.
the arye rcc-1 has a very similar design philosophy, although it’s shorter & less wide, its slides are more slanted and the top of its sides are flat & “sharp” as opposed to rounded, so it may feel more cramped than the g305. this can be compensated with (thicker) grip tape to flatten the sides out more, but that might deviate a bit more from the g305 design principles than you’d like. otherwise, great performance, build quality, and coating.
the lamzu atlantis mini, while markedly different in its profile, has a similar design philosophy of tucked-in sides and a flattish top profile for palm/knuckle contact without sacrificing the ability to fingertip grip if you really want to. great build quality, performance, coating (pink, championship edition; i have a white lamzu maya x and it feels fine too, but not sure if it’s the same exact coating as the lamzu atlantis mini championship’s white coating).
forgot to mention the ajazz/attack shark aj159 apex, which is a minified endgamegear xm2w and is similar to the lamzu atlantis mini in the sense of its top profile and how it facilitates an aggressive claw grip, but it just has slanted sides similar to the g305/arye instead of also being curved (i.e. the atlantis mini has a front flare whereas the aj159 doesn't). i have it in blue & can vouch for that coating. good build quality, performance, etc.
lots of small mice exist that don’t have the tucked in sides as the g305, and that’s an entirely separate rabbit hole. the superlight 2c may be perfectly fine for you (i have the magenta version & can vouch for that coating), but the sides being flat/contoured (where there’s a “waist”/indent for your thumb and pinky in the middle of the mouse) rather than slanted or concave (and especially with the superlight 2c’s bulbous front flare) & the overall profile being “half a potato” may make the mouse feel blunt in your hand when you’re used to being able to pull a g305 style shape in towards your hand more aggressively.