Final answer:
In 'Fifteen Years On The Bottom Rung', Peralta faces obstacles like poverty, ignorance, and social degradation that Zannikos did not face when coming to America.
Step-by-step explanation:
In the book 'Fifteen Years On The Bottom Rung', Peralta and Zannikos both faced obstacles when coming to America, but there were some differences. Some obstacles that Peralta faced that Zannikos did not include poverty, ignorance, and the burden of social degradation. Peralta, as a poor race in a land of dollars, felt the weight of his poverty and ignorance, as well as the hereditary weight of corruption from white adulterers. These obstacles made Peralta's journey to success more difficult compared to Zannikos' experience.