How is Ukrainian different from Russian, besides the alphabet?
Well, Ukrainian is the most like Belarusian. Ukrainian and Belarusian are kinda like Scandinavian languges (of course excluding Finnish). Then it's Polish with 70% and with Russian is a bit more than half. So if you accept for example Swedish and Norwegian as languages, the same you should do with Ukrainian and any other Slavic language :) The words are different, pronunciation is different (for example "г" is "h" in Ukrainian and "g" in Russian).