I bought the City card which includes multiple sight access, it's better value overall

TOTR gives you views of ESB Time Square, Chrysler building and Central Park. Queues are fairly quick at TOTR. It's a difficult one because World trade tower is novel for it's own reasons. You'll visit the contemplation pools, maybe do the Statten Island Ferry and view the Statue of Liberty at that end of the Island. When I'm next in NYC I will go up 1WTC just because!!

We went mid morning and went straight through (and bought our tickets at the same time). Once up top there is so much room that it doesn't seem crowded. There are three levels.

Top of the Rock. A vista é melhor e o espaço lá em cima mais agradável. Ademais, você tem a oportunidade de desfrutar todo o conjunto arquitetônico do Rockfeller Center, seus jardins e toda a parte térrea com restaurantes, pista de patinação no inverno etc.

You can choose what time you would go up, but be there 2 to 3 hours before your preferred time since there are a lot of tourists depending on the season you'll visit.

Hello, You will be able to book the time slot for an additional 10$ fee but it is only valid for the day of purchase. You cannot use it Friday and Saturday unless of course you can work it out with person at desk. It is worth it though

Yes you can use it on seperate days.