In terms of parameter controllability, vray is much better than keyshot. Vray contains too many advantages, such as physical camera, texture mapping change, shadow control, lighting type, rendering adjustment parameters, output control and so on. Almost every factor that can affect the still frame picture is controllable. And this software can achieve the effect of movie level. Learning vray well is also helpful for getting started with other renderers. Please refer to the third and seventh cg movies for specific applications.
Keyshot also has its own advantages. Personally, I think it belongs to a lazy integrated software. Simple operation, intuitive effect (real-time rendering, what you see is what you get) and fast drawing speed. Compared with vray, there is not much room for material adjustment, but it is more real. Although you can't play with different types of lights yourself like vray, the rendered things will look light and have a strong sense of detail because of hdr lighting. Therefore, these advantages make keyshot a rendering tool for industrial products. (it seems to be positioned like this. Single model rendering is great, large scene processing is slow, and the material giving method is not simple. Models imported from other software are also prone to errors. Moreover, you need to group the models in advance and give the materials to the faces you want. This is not as good as Sue's material editing method. . . Therefore, the key is basically not used in industries such as architectural landscape. )
Vray is much more professional, and all the small jobs are given to keyshot.