I own a xf100 , xf300 and 7d. I agree with walter, that you will have a hard time getting a film look from a run and gunsmall chip camera. I have worked very hard to color balance and would to say that you will be lucky to do so.I love the 300 and the 100, but i also agree that ittakes a lot of forethought to get away from a video look with them. As stated, lighting, camera distance from subject (zoomed in from the right distance), all contribute to it.
If all you want if great filmic look between a higher end camera and a lower end (like the 7d), i would get a different camera (sorry).try the look between a GH2/3 and an AF100 would be closer to what you want, consistently.
But take a look at my stuff, all the theatrically lit stuff likely has 300/7d in them, I tryto label in the descr. This one in particular i had a hard time matching, very frustrating. I point it out because it is the worst of the lot for balance between the two.the video of 1968 at the same site might be the best.
https://vimeo.com/23144117
Remember too, it seems to me, that a 7d at 24p, will also be more subject to blur if the subjects are low lit, and in motion. But work with learning those flatter picture files, like the BBC ones, for the xf300, and tone down the 7D as well. I have used settings from P. Bloom i believe. Flatter is better for what you want.
For my next work that needs a filmic look, I’m going to shoot with two dslr’s.or dslm’s. But to be clear, my clients love the 300 look! I am no longer a fan of the 7d for video. But work with what you got.
Al