If you are working in a facility that uses smoke/flint/flame, for compositing Maya/3ds works better (all are discreet products. as for “realistic” 3ds and maya have better lighting systems, and photorealistic renderings, but mostly your final product will realistic based on your compositing skills.
Also if you are planing on compositing 3d into live, I would check compatibilty between 3d trackers, boujou/syntheyes etc and C4d.
Good luck