I think it's a matter of opinion. The styles and surroundings of the two scenic spots are different. Use my feelings and understanding of going to these two places to analyze it for you, and then see which type you like. I took the picture recently, too.
first of all, let's talk about Datang city that never sleeps. The city that never sleeps in Datang is an antique block which integrates shopping, catering, entertainment, leisure, tourism and business with the flourishing Tang culture as the background. The focus is on antique neighborhoods, so for many tourists who come to Xi 'an 'an and many local citizens, the city that never sleeps in Datang is not fun. Because most of these people are interested in real historical buildings. So what is its history? Because of shopping, dining, entertainment, etc. Can be done here, this is a one-stop experience. If you just want to visit the tourists who eat, you must find this place very interesting.
On the way to the city that never sleeps in Datang, you can see the fountain in the North Square and walk along the square. Miko Wu in Xi 'an was completed, and the whole city that never sleeps was renovated with unique lighting and floor. When you reach the finish line, Xi 'an An Joy City is newly opened. You can visit, eat and see Wukong, which is two stories high.
Actually, it's not far from the Big Wild Goose Pagoda to the Bell Tower. If you have time, the Bell and Drum Tower is a landmark building with Huimin Street next to it. It is recommended to go to places like Dapiyuan to buy food. There are too many people in the street, indeed.
Next, talk about the Bell Tower, which is a real historical building. When the light is turned on at night, it is called a beautiful building. Visitors who like historical buildings will definitely like it here. Moreover, it is also a landmark building in Xi 'an, which can be climbed during the day but not at night. It's mainly for visiting, but if you want to do something else, you may find it is not fun here.
I might as well extend the surrounding area to you. The corner of Datang City, the city that never sleeps, is connected with the South Square of Big Wild Goose Pagoda, which is a real ancient building. If you go to the North Square, you can also see the music fountain at a certain time every night, which is also a must-see travel experience in Xi 'an. Next to the bell tower is Huimin Street, where you can stroll around and eat instead. It is also the most famous snack gathering place in Xi 'an, so you shouldn't miss it. So where is the fun? You should have an answer in your heart, right?