In order to provide a piece of evidence to compare the level of the Incas’ and Maya culture’s investments in public works projects, you can mention the following:
As regards Incas' architecture: Qollqa were stone houses situated on hillsides. They had drainage canals in order to keep the interior dry. Another example can be Machu Picchu that was a settlement like a fortress (located in the High Andes of Perú)
As regards Mayas' architecture: its region consisted of the northern lowlands, their pyramids relied on intricately carved stone. They built temples like 'The Temple of the Cross at Palenque. Usually, their structures were covered with stucco to smooth imperfections. Besides, their structures were aligned so as to have an astronomical observation.