the 700D definitely has another line interleaving scheme than the 5Dm3. cr2hdr reports "BddB RGGB" for the 5Dm3 and "BdBd RGGB" for the 700D. Page 5 of dual_iso.pdf talks about an interleaving pattern of l,l,H,H,l,l,H,H... for the 5Dm3, but I think the 700D uses something like l,l,l,l,H,H,H,H,l,l,l,l,H,H,H,H....
To illustrate, I cropped the first top left 32x32 pixel out of a 5Dm3 and 700D CR2, respectively:
Needless to say, current cr2hdr interpolation algorithms do not like this. I'll look into this some more, but maybe someone has some input already?