i'm not an expert in either, but RAG is like dropping some 'useful' info into the prompt context, while fine tuning is more like a performing mix of retraining,

i'm not an expert in either, but RAG is like dropping some 'useful' info into the prompt context, while fine tuning is more like a performing mix of retraining, appending re-interpretive model layers and/or brain surgery. I'll leave it to you to guess which one is harder to do.