Polak, Lindell, and Klingberg are all concentrated in one spot. Heiskanen’s is much more all over the place (in a good way).
I'd be willing to bet Klingberg's charts in 14-15, 15-16 and 16-17 look way similar to Miro's 18-19 chart. Klingberg has had a lot creativity beaten out of him by the Hitch and Monty