Right?! Logitech sells several Mac-specific keyboards and mice, but most of the normal versions already have Mac key markings (with Windows markings as well) and work every bit as well with Macs as with PC's. In addition, this keyboard appears to be available *only* in the "quiet tactile" version, while the "normal" version is also available in "linear" or "clicky." I do like the color scheme, though.
Also, I don't think Logitech quite gets mechanical keyboards yet. What I mean by that is that Logitech's mechanical keyboards feel great, but they give up three keys to the device-switching feature (compare, for example, to Nuphy, which uses a modifier key to access that feature and therefore doesn't give up primary key functions). This is a big deal for those choosing "mini" keyboards over extended keyboards. They also made some weird choices regarding the functionality of their function keys (emojis over Mission Control, for example) and don't include replacement key caps that someone could use instead of the Logitech-selected options. It's also not possible to simply switch out all of the keys (a common feature of mechanical keyboards generally), as the space bar is a non-standard size. Logitech is *so close* on these, but badly needs a version 2.0 with these improvements.
But back to your point, if you are looking at these, then I strongly recommend considering the versions that are not Mac-specific. You aren't giving up anything.