Soup works on one IMBD page but not on another. How to solve?

url1 = "https://www.imdb.com/user/ur34087578/watchlist"
url = "https://www.imdb.com/search/title/?groups=top_1000&ref_=adv_prv"

results1 = requests.get(url1, headers=headers)
results = requests.get(url, headers=headers)
soup1 = BeautifulSoup(results1.text, "html.parser")
soup = BeautifulSoup(results.text, "html.parser")

movie_div1 = soup1.find_all('div', class_='lister-item-content')
movie_div = soup.find_all('div', class_='lister-item mode-advanced')
#using unique tag for each movie in the respective link

print(movie_div1)
#empty list
print(movie_div)
#gives perfect list

Why is movie_div1 giving an empty list? I am not able to identify any difference in the URL structures to indicate the code should be different. All leads appreciated.