Hi - did a load of research - I've always put All Terrain tyres on my 4x4s - amazing off road, which I often am (muddy fields), and amazing in the snow - really amazing. It's why I don't buy winter tyres, I go AT for winter - I get the almost best of both worlds - mud, and snow. I say almost as apparently an AT tyre won't be as good as a true winter tyre on packed snow - but they are damn close - close enough you'd not notice unless really pushing it. Used to have a  Disco 3 and ran General Grab