I agree with Moper except that the duration does not change with the rocker ratio change, just the rate of lift.....the 1.6 ratio increases the rate and amount of lift with no effect on duration.
Sorry but a higher ratio rocker does affect duration at .050 a little due to bringing the valve up to .050" lift quicker. It would also have to affect the total duration since it's rate of lift is faster. Although it is so minimal it probably wouldn't be noticed.