Having similar (or even the same) sensor in the 70D and 7D Mark II doesn’t seem to be a problem given the common 18MP sensor found in the 60D and 7D. A number of features set them further apart than just the sensor.
That said, the 70D is rumored to be more on the level of the Canon 50D build than what we see in the smaller and more plastic Canon 60D. Returning to this size and build quality suggests that the 7D Mark II would likely move further into a more “pro” realm of build quality and features – even though it would still feature an APS-C sensor.
Would the rumored redesign to bring the 70D back into 50D build quality realm be more welcome? Or, do you prefer the smaller size and lower price of the Canon 60D?