What advantages and disadvantages do the two languages have? Is one language easier than the other for a lazy person who only wants to learn a few phrases? Are both of them tonal? How many sounds that don't exist in English are there in the two languages? Does Mandarin Chinese have more learning resources in English-speaking countries like Australia?
(In my case, I'm a native speaker of English, and speak enough Japanese to get around as a tourist in Japan and have a little bit of a conversation)