Now the physics beast rears it's ugly head.
8% lift is negligible. In essence, it does nothing.

HOWEVER
How quickly they open the valve and how long they hold it open has a LOT more effect than how high they lift it. How long the valves are open at the same time can also move the power peak higher or lower in the rpm range.

If the stock cam opens kinda lazy and holds .300" lift for 180 degrees of duration and the new cam holds .300" lift for 200 degrees of duration, the new cam will usually make more power if the peak lift is within 10% and overlap is not seriously altered.
With modern overhead cams and roller valve train, engineers are really getting some wild rates of lift and extended duration out of cams. Factory guys have to keep the emissions police and warranty bean counters at bay while the aftermarket guys can spend the time and money to make a more radical piece.
There comes a point where you can't lift the valve any higher because the spring hits coil bind and becomes a solid mass, valves get dangerously close to pistons, and simple geometry issues cause the lifter to begin rolling too far across the head of the valve. Any of these issues can lead to catastrophic engine failure. Before you hit any of those points, you start to look at duration. Spread that lobe out and make that sucker big and fat. That will let more air in over a longer period of time than just poking it a wee bit higher.

If you offered me a cam with 8% more lift with all other factors being the same, I'd laugh in your face.
If you offered me a cam with 8% more lift but with more duration where it counts and timed better to my application, I'd have the tool box open in a heart beat.

Looking at the lift alone is like telling a single man about a well endowed woman. A large bust can usually be found on a 600 pounder. What else is tagging along for the ride, yanno?