The phrase "legal roids" is an oxymoron. Anyone who attempts to sell "legal roids" is a thief. So, to answer your question, roids/AAS (absolutely none of which are legal) are "a better choice" simply because they are the only choice. Yes, you certainly will bulk-up by consuming 4,000 calories per day. But those results will pale in comparison to the results one will achieve when one consumes 4,000 calories per day in conduction with AAS, hard and consistent training, and at least eight hours of sleep per day.