There is no right or wrong answer to this question. The most important thing is to be comfortable and confident. There is no dress code for a job interview. You can wear jeans and a t-shirt, or a suit and tie, or a skirt and blouse. The important thing is to be comfortable. If you are not comfortable, you will not be able to do your best.
You should wear what you feel comfortable in.
I'd wear a suit and tie, if I were to go for a job interview.
I'd wear a suit and tie because it's more formal than a casual suit, and it's more formal than a casual shirt.