So OP, you can ignore this guy/girl, completely. The poster has no idea what they are talking about. The poster has no hr experience. The only advise they gave you is that you “probably” will get paid more at some fictional company.
Now,
To succeed at any interview, be your self, your good self. Make eye contact. Be factual. Think I got this, I deserve this.
At last, ask questions of the interviewer when you are given the chance to do so, even if you are not, say , I have a few questions. Ask questions about what the job entails, how many others have the same position as you, also ask a little about the company as well.
For HR, answer in a way that shows your ability to organize and prioritize tasks. Show that you are detailed oriented, and dont mind sitting on your butt for long periods of time. Speak in manner that is clear and concise, and your ability to scold people ,from to time. Like children.