I am a newbie pls let me know which one is better?
Like asking which one is better: unity or unreal, jeans and t-shirt or suit and tie.
They are entirely different tools. For games, flutter isnt even an option. For super UI heavy non game apps, if you are good with DART then prolly look into flutter. If you are good with Lua or dont know any prpgramming then definitely corona.
Which one is better? Pc or mac? Linux.