Trail Hunter has a guide to explain what to look for in a camera, helping decide what features are needed and what is valued by reviewers. They also offer multiple summary lists of cameras with their respective features, and most importantly, their review ratings.
Amazon has user reviews from customers. To compare these reviews, look at the star rating, the number of reviews and the common sentiments within each product. When looking at a star rating, it is important to look at the number of reviews. A rating with only six reviews may not be as accurate as the one with 100.
When reading reviews, Amazon automatically sorts reviews by placing the reviews rated most helpful on top. Amazon also has an option to filter only results by verified customers, possibly giving a more accurate comparison.