Nate W. directing it on style won't have any additional benefits. Really just describing the goals of the website and its purpose and a little background of the company seems to yield the best results - keeping it simple. Then we provide the tools to make edits very quickly and to regenerate sections or copy. Its not meant to be a tool where you over engineer the prompt and it spits out a 100% ready website to launch - at least not in my experiences.
As for the models, its a combination of GPT versions depending on the task, claude, and some trained models - all dynamic based on the task, availability, and costs.