I use Su, and a "easy to use" renderer because I need to present yesterday, and am very lazy. My renders are not WOW. But what I have seen of "Piranesi" it is very WOW! Is this a case of "greener grass"? Photo realistic is not WOW without a lot of work, experience, and post processing (PS). They have some software that is "real time", but not ray-tracing. Your typical system is not real time, and you cannot see what you are doing. To learn well, you need to have time to burn. Still, look at Solo's stuff
for some example of a Master, and if that is your goal, just ask him what he uses (actually I think he uses several systems, each for different things).
Some people are just talented. Here
is a unrendered Su presentation that I like.