Say I have two physical products I'm looking at developing that are similar to each other. For sake of this example, lets say they are both for the camping industry. One is a new tent and the other is a new grill. They will both cost around $100. What is the most cost effective way to get real market research on which idea to pursue? Is there a way to do it without building a prototype first or is that always the best way?
Thanks in advance.