This visualization compares two French railway stations by displaying their available on-site amenities, access modes, and traveler trip purposes side-by-side as small colored rectangles. The code uses D3 v4 (`d3.csv`, selections, and attribute manipulation) to load a dataset of SNCF station statistics, then renders SVG rectangles to encode each categorical variable for both selected stations. Station identifiers are defined in the script, and the tooltip and text elements display station names derived from the underlying CSV data.