I wouldn't say that Maray's chart as cited by Tufte is directly comparable: it displays the timings of trains along a one-dimensional railway, therefore display

I wouldn't say that Maray's chart as cited by Tufte is directly comparable: it displays the timings of trains along a one-dimensional railway, therefore displaying two dimensions of continuous data for each train (the second dimension being time). The online map displays a two-dimensional area, with an extra (quantized, not continuous) dimension of time with the colour-coding. It's a tradeoff between displaying more precision for fewer train timings or less precision for many train timings.