I have skied both these mountains many times and I have found each mountain is a better choice for certain people.
For Example,
Tree Skiers - Gore
More Vertical, less traversing and skating - Whiteface
Snowboarders - Whiteface
Familys With Children - Whiteface or Gore
Intermediates and beginners - Gore
More experienced skiers - Whiteface or Gore (depends on terrain preferences)
What do you think?
I've lived in New York my entire life.