The difference is in the pillars! From afar, the pillars look very similar (like in this picture). But the top of the pillars is different. Greek architecture follows the golden rule, which is shape that can be wholly divided into up into a square and a rectangle that, when combined, establish a ratio of 1:1.61.
The Library’s founders wanted it to be a repository of knowledge, so they sent agents with large sums of money to buy as many scrolls as possible about any subject and by any author. The Library throve for decades and became especially famous for its many works on literary criticism. The Library of Alexandria was destroyed in a war during the late 3rd century A.D.
Did you know that the Ancient Athenians had their own distinct style from the rest of Ancient Greece? Many of the vases are destroyed and you cant see the designs, like in the picture below. But I love the black and terracotta color geometric style