I installed Renderman yesterday and some people says Renderman is better, so I created an scene with the same objects but with complex materials to compare both renderers.
For Renderman I used PxrLMSubsurface, PxrGlass and PxrDiffuse.
For Cycles I used Glass material, Difusse Material and a custom material using translucent, glossy and volume scatter and absorption.
Here’s the tests
(Min samples: 32, Max samples: 48, Time: 09 mintues 10 seconds)
(Samples: 48, Time: 07 minutes 20 seconds)
In conclusion Cycles is faster than Renderman, but the colors in Renderman has more contrast than in Cycles, also the SSS material in Renderman looks better than in Cycles (maybe I’m not so good at making materials as I thought :p), but cycles gives more freedom than Renderman in materials creation (or at least in Blender). So I think Cycles is good enough to make great things as well as Renderman and Arnold, also it’s free, so if you want to start a project but you don’t have enough money to buy a professional renderer, you can use Cycles and have a high quality render.
Here’s the file if you want to try to render it:
untitled.blend (875 KB)