The WiSE Level 1 ($150, Online) and WiSE Level 2 ($250, Pearson VUE only) are separate exams. WiSE Level 1 covers ZoneDirector 9.6 and Wi-Fi Essentials. WiSE Level 2 covers these and also Basic Site Survey.
With WiSE Level 1 Online, you pay once and have unlimited attempts within a 90 day period. Once you purchase the exam and enroll you can take the exam any time within the 90 days.
Another quick question regarding this topic. Will you have the test available to take multiple times even if you pass on the first attempt? The reason I'm asking is I would like to see more versions of the test and challenge my knowledge for the Level2 exam since that's more restrictive and I'll only have one attempt to pass it.
Like any certification, it's always nice to have a practice exam in addition to the training videos just to see how the test questions are structured.