It is not difficult to understand what you quoted. Point is there is a little basis for comparison since Atleti has a far superior style to Leicester. They retain the ball better, play more intelligently, defend better and are more successful. The Atleti players and Simeone pointed out some similarities in core characteristics such as grit and determination but that's where it ends.
Antoine Griezmann said it, Filipe Luís said it and Jan Oblak said it, too: Leicester are similar to Atlético, both for what they have done – and they more than most teams in this competition appreciate that – and for how they play. Strong, physical, well organised. Difficult to overcome defensively, and swift to counter‑attack, direct.