codeblocks vs visual studio

Hi, in 3 months I will be writing an important exam (polish matura) and I’ll have to write a few programmes. I need to hand in a declaration due tomorrow and say what app I will be using. I don’t really know the differences between them. I’ve been using code blocks for 3-4 years and I’m used to it. Recently I started taking some private lessons. The guy told me that it’s a bit outdated and that I should be using visual studio cause it’s better/easier but I’ve never used it before and I’m lost. He told me that we’ll work on it but I’m not sure if it’s a good idea to change now. Is visual really better? How? Should I be using it instead of code blocks or stick to the one I already know (considering it’s an important exam)?