Ah, I see were your going. As a general rule, the smaller the displacement the less useable power and torque the engine will produce. Now I know this isn't always true with a Honda, but I'd still think the 1.6 would make less torque, and would have a narrower powerband that the 1.7 I'm just guessing though.
Despite the lower miles, the car will still be valued by lenders and insurance companies based of the miles on the chassis. They don't care if it has a brand new motor with 100 or 1000 miles on it. To them it's still a car with 70,000 80,000 or a 100,000 miles on it.