Short Layover at Istanbul (IST)

Hi, I will be taking a flight from the UK to Asia via IST later this year, with a connection time of just 1h15m. Is this enough?

Both flights will be with Turkish Airlines and on the same ticket. My flight arrives at my destination at 1am local time, there’s another flight which would get me there at 4:30am local time. Should I just opt for the later flight with the longer connection? Or is the idea that if I miss the first flight I’d be able to be put on the later one that arrives at 4:30am?

This is my first time making a connection so understandably I’m very confused and would appreciate any help.