There are many differences between writing and talking, but the most obvious difference is that when you write, this means that the things that you want to say would need to be placed on paper. When you say that you want to talk, this means that you are going to say the things that you want to say out loud.
here are a lot of people who may be good at writing but not at speaking and vice versa. Some people find it easy to express their feelings when they write things down rather than saying things out loud. Some people are gifted in both. Writing and talking can be considered as talents, but they can also be considered as skills that can be improved further.