samsung 850 evo m.2 2880

http://www.bestbuy.com/site/samsung-850-evo-500gb-internal-sata-solid-state-drive-for-laptops/4279223.p?skuId=4279223&productCategoryId= Anyone pulling the trigger?

I was wondering if the SAMSUNG 850 EVO M.2 2280 1TB will work with my MSI Z97 Gaming 5 mobo? It says it supports M.2, but the Samsung 850 M.2 says it's M.2 2280. Three questions. 1 and most important. Will it work with this mobo? 2, What's the difference between M.2 and M.2 2280? Is that...