They’re quite similar in many ways, and when I say similar, I’m referring to the benefits of their design. Whilst the Amphions aren’t quite point source like the UniQ design, they are point source down to 1600Hz, which is where the mid/bass driver takes over in the Argon range - still lower than most speaker manufacturers. Because of the HF unit using a large waveguide, bit the Amphion and KEFs tend to behave very well in many different types of room. They don’t tend to excite the first reflection points like many other speakers do, so reduces (or even negates) the need for EQ, particularly higher up the range. Imaging and focus is a strong point of both manufacturers. The overall tonal balance isn’t too different, as both manufacturers use metal drivers - the KEFs don’t really sound like an all metal driver speaker, and the Amphions even less so, maybe because they use titanium for the HF unit. I’ve had the Argon 0 model at home in my own (currently 2.0 AV system) and they sounded great - I just placed them where my existing speakers are and away they went (I don’t use EQ), they just worked and didn’t produce any boom issues. My room is a bit more damped than most, so like the KEFs in my room, I tend to add a slight treble lift to keep things exciting, but in a normal room this isn’t needed. If I was only selling one of these manufacturers, I’d be stating a few negative points of the ones I don’t keep (only natural ), but as I keep both, I’m hardly going to pitch them against each other The Amphions are a little easier on the amplifier being an 8ohm load, so better suited for those who want R Series quality but don’t or can’t have a suitable amplifier to do them justice. I’d still treat them like R Series though as they’re revealing of the source - their speakers are derivatives of (passive) studio monitors after all!