The Osram is a good device, but not the only one that requires no wiring. GoControl has a very similar switch cover design (although it’s zwave). Cooper 9500, which looks the most like a regular switch. Hue dimmer switch (a little bit cheaper then the Osram although the Philips doesn’t work with SmartThings, it just works as a parallel means of control). SmartenIT 3 toggle. All have different features and looks.
So just depends on what features you want, and the aesthetics you prefer. 
I believe Core will work with any Device which is set up as a “button controller”, including this device with the original DTH. But @ady624 would know.