I bought them both 10 days ago along with a Denon X3800h and a SVS SB-3000 subwoofer and, after quite a lot of AB switching between them, I definitely prefer the R3. Both were EQ-ed with the MultEQ app, several measurements and saved presets.
Not sure how more detailed, better separation and voices a bit more forward would translate to technical terms but there's an audible difference when switching. Volume is roughly the same, measured by a phone db metter.
And i really prefer the looks of Lintons, they were also 1000 USD with stands included, compared to 1250 USD for R3s with decent stands.
In the end, I will return the Lintons although, if I just listen to them 1 hour, they really sound good. If I only had them, I would be quite happy but, having them both, I can't help prefering the KEFs. They are a 9, Lintons are almost an 8, if I were to grade them.