Baring in mind that I was significantly younger when I did Freezer, the main thing that sticks out in my mind with Freezer is that it had actual different scenes and progression.
Asylum was effectively a corridor, a huge chain mesh section, and another corridor. And don't get me wrong, I get the purpose - an endless chain line maze which seems to go on forever where you're target by loads of people, but you don't know if it's 1 or 100, etc. But it just always felt repetitive for me - nothing exciting or interesting.
Freezer had progression throughout the maze - you had different scenes (even if it was just 'prison bars' or a wall as opposed to mesh), different characters who would have different things to do. It had a build up. Asylum lacked that for me.
As I say, I see why people loved Asylum, but that sort of scare attraction does little for me.