Heres how they compare.

Its been so popular that Logitech has been producing it, unchanged, for six years.

Its worth noting up front that all of these mice are, sadly, for right-handers only.

Logitech does have a fewleft-handedandambidextrousmice, but the three kings are made for right-handed folks.

Its perfect forpalm gripperswho like to rest their whole hand on the mouse.

Even if you have smaller hands, this larger mouse will fit them well.

Its also a little heavier than the MX, but it shares the same footprint on your desk.

All of the buttons are programmable through Logitechs software.

The MX Master has all of the same buttons the Performance MX boasts, with a few improvements.

Its perfect for swiping through documents and scrolling through spreadsheets.

The back and forward buttons rest directly behind it.

For me, theyre perfectly placed.

The Proteus Core adds a few buttons to the MX layout, but not too many.

In fact, it only has three more than the Performance MX.

All of the buttons are customizable through Logitechs software.

Wired vs. Wireless

The Performance MX is only available as a wireless mouse.

The MX Master is also wireless, but it adds Bluetooth support to the mix.

To switch active devices, just press a button on the underside of the mouse.

The Proteus Core, on the other hand, only comes as a wired mouse.

After decades of hating wired mice, the Proteus Core has converted me.

Beyond button programming, scrolling options, and pointer sensitivity though, thats about it.

The Proteus Core uses a slightly different program called Logitech Gaming Software, which is significantly more powerful.

However, with the press of a button under the wheel, it switches to a free-spinning mode.

I cant live without this feature in a mouse.

(Check out the video above at the :37 second mark to see it in action.)

The MX Master made this feature even better by re-introducing the MX Revolutions auto-detect for scrolling.

When the scroll wheel slows down, itll click back into manual scrolling mode.

Its the best of both worlds without having to change your habits at all.

Its definitely more feature-packed, but whether those features are ones that matter to you is another story.