this really depends on what work the studio has to offer to a junior. IMO choose what seems more appealing to you and tailor your portfolio around that so that you get hired to do what you want to do, and if you don't get hired at least you'll have had fun. Realistically you will need both, and there are like... a small…
This might be interesting.. somehow using octane with blender and also providing some "best guide" .. https://blenderartists.org/t/zenit-ttl-camera-blender-octane/1644112/3?u=okidoki