What evidence? We have no idea what Gore would have done.
Can't prove something that does exist, so yes, we don't know what exactly Gore would have done. I know what he wouldn't have done though. He wouldn't have fired the terrorism czar, he doesn't reject meetings that mention Osama Bin Laden's name, he doesn't focus on Iraq and Hussein over the growing threat of terrorism (before AND after 9/11 if it still happens), among other things.
Bush and Cheney were operating in different realities from the onset. The administration they gathered around themselves also occupied a different reality. I find it incredible to even suggest things go more or less the same with an increased focus on terrorism from the get go from a completely different administration with different goals and aims.