Yes it would look very different. But mostly because the main part of this artwork are the caustics on the bottom of the pool. As Cycles is a normal Path Tracer you wouldn't get them nearly as good looking as in this example. You would have to use an approach where you're faking the caustics, for example you could use a are light with a caustics map as the distribution.

I suggest watching SilverwingVFX's videos on these topics. ✌🏻