We have only stayed Tower. Like DLgal stated, the difference is not nearly as many people on the Tower floor due to the suites, so the lounge is much, much quieter. I believe the CL offerings are/were even a little different. For firework viewing, we pretty much had the entire lounge and balcony to ourselves. There was so much food, the CMs were begging us to take more back back to our suite. This was for our our 15th anniversary several years ago. It was absolutely lovely.
Almost. There is no 13th floor. Tower Club is on the 14th floor; Atrium Club on the 12th.