How did the constitution of the Weimar Republic differ from that of the second German Empire?

Answer 1

"The constitution's title ["Die Verfassung des Deutschen Reiches" ("The Constitution of the German State ") EVT] was the same as the Constitution of the German Empire that preceded it."

"The fundamental tenet of the Weimar Constitution was that Germany was to be a republic on the parliamentary model with a parliament elected using proportional representation. Universal suffrage was established, with a minimum voting age of 20."