I think HWH-Trichy is a very hit & popular train. Yes,I travelled in both of Coro and HWH mail. In Coro,co passengers were good but the most irritating thing was the daily passengers. Some of them were drunk also!!And that day Coro was getting late at every station.It reached HWH around 02:00 PM.After that I didn't availed Coro. I had bad experience with this train. Even MAS-HWH is far better than Coro.