You want something that can be hammered with a sense of safety go with the ST. You want to drive slower but have more fun get the zed.
I have a 172 and a 350. One isnt better than the other as they both have plus points but I personally feel the zed is more rewarding, the noise, the weight of the steering wheel and the driving position make you feel a little more special. The clio on most roads is faster not because it is but because I am still comfortable with FWD, I can push harder without worrying and can be steered with a throttle believe it or not.
Depends on yourself though. Drive both. Your not wrong for liking one over the other. As I said the 172 is faster (until Im a master driver ) but the 350 feels so much more special when doing it. Some people like the speed, some people like the drama. I prefer the latter