i've done this a few times having 2 x c200 and a 5d mk4. it's not tricky if you get the white balance and exposure close when shooting. they are different cameras so you wont get an exact match but close enough. on the c200 I've used both the rec 709 and the wide dr settings as well as matching the raw output too. tbh tho i wouldn't use the standard settings on the 5d for shooting video. too contrasty and too sharp. I'd use the neutral profile. it's flatter and easier to match before you then apply whatever overall colour you want on the completed film/shoot. if you have the log alt on the 5d you could also just shoot canon log (not 3) on all cams. good luck.
