The descriptions of the link are pretty much bang on, although I don't find the smog in San Jose so bad. And San Jose does have one attribute that's better than San Francisco: the weather. It's sunny and warm in San Jose with cool nights. Whenever I go to San Francisco, it is cold, windy and foggy. The San Francisco Zoo is situated close to the ocean in a part of the city that is seemingly permanently overcast and cold. I feel sorry for the animals.
Other than the weather, the best thing that can be said about San Jose is that it is close to a lot of interesting events and places that are not in San Jose.