and for which situation? as i see it, this question could have two different approaches: animation or still. and there are many different features that can be comparable in each one, caustics, GI, depth of field, cameras, materials, ease of use, speed, etc. these days we have so many options we don�t know where to turn. just looking at the galleries of each render engine its not enough to decide.
which one do you like more, than other? and, most importantly, why??