Usually, a W rated tire will have stiffer sidewalls, which results in better handling, but slightly less comfortable ride compared to V rated (H is even softer). A W rated tire will also usually have a shorter tread life than a V speed rated tire.
However, there are other complicating factors, such as the use of sophisticated (and expensive) tread compounds, tread pattern, and other factors that makes comparing tires from 2 different manufacturers a little harder.
Got it.
When you say less comfortable, is it that the road is felt more or is it noisy or some other factor that causes discomfort?
Mileage - I believe mileage is also lower - although it appeared from Tirerack reading that the mileage difference is like 1-2%.