15. (15 points) Train $109 T$ departs from Beijing at 19:33 and arrives in Shanghai the next day at 10:26; Train 1461 departs from Beijing at 11:58 and arrives in Shanghai the next day at 8:01. Question: What is the difference in running time between these two trains in minutes?
【Analysis】Calculate the running time of the two trains separately, then find the difference, which will give the answer.
【Solution】Solution: $109 T$ operation: 24 hours - 19 hours 33 minutes + 10 hours 26 minutes = 14 hours 53 minutes,
1461 operation: 24 hours - 11 hours 58 minutes + 8 hours 1 minute = 20 hours 3 minutes,
20 hours 3 minutes - 14 hours 53 minutes = 5 hours 10 minutes,
Answer: The running time of these two trains differs by 5 hours and 10 minutes.
【Comment】To solve this problem, choose an appropriate method of calculation based on the characteristics of the time.