Hello guys! I would like to advise you that if you are deciding the subjects on the basis of demands then both have superb scope but in different field and can differ from country to country so i would like to tell you to look around the your local market. Only that analysis will give you right idea. as far as product designing field is considered I think that basic skills required in it includes generating creative and innovative ideas. Being a product designer you should be able to do research about your product and should also be able to understand popular marketing and manufacturing trends of the industry. If you think that you would love to watch yourself doing these kinds of things then go ahead, product design field can be yours. At last what is more important that choose a subject according to your capability not according to your needs because if you will your self as specialists in a field then nobody can stop you? I personally think this.