The French symbols are either pure black or pure red, they're symmetrical, and they're fairly abstract. The "diamond" is just a rhombus. The Spade and Club are fairly abstract shapes that don't look like anything in particular.
In the image, all the other versions are multicolored, and still seem to represent real-world objects. But, I'm curious if there are "modern" decks where say the coin (oro) is just a circle, or the club is just a long thin rectangle, or something.