Yes, the Ranger roller rocker debate rages on. We discussed it here in depth a while back. My conclusion is this:
1. The valve stem, cam and lifter (pivot point) are all in the same location with either rocker. So, the only thing that gets changed is the location of the roller.
2. IF..., we can assume the the roller in the earlier design has the roller centered over the centerline of the cam then a rocker with a greater ratio HAS to have its roller offset from directly below the cam and produce less lift for he same given cam. To better illustrate if the early design had peak lift with the cam nose at 6 O'Clock the offset roller would encounter the the cam nose peak at say..., 4 or 5 O'Clock and, not move the valve as far.
3. Therefore, I'd assume it is like a dog chasing its tail. Yes, a greater ratio rocker should produce more lift IF the cam was producing full lift at the 6 O'Clock position. But since it is not it is doubtful the ratio difference compensates.
I would be curious to know WHY Ford chose to make the changes. Again, assuming the early roller rocker was centered over the cam centerline I'd think moving the roller would induce more side load.