In case it helps, I've run into the same types of problems frequently, and YouTube reviews are a godsend.
Random people actually film themselves unboxing and using the product, and you can watch what buttons they have to press, etc.
Also you can virtually always download the manual as a PDF.
Of course that's not a list, and it takes a lot of work. It's deeply unfortunate -- somebody like Amazon could actually implement the kind of comparison matrix you're talking about, but they're not exactly innovating on the UX front. :(
(Amazon does sometimes show a comparison matrix of 4 products with something like ~6 rows of features for some products, but I think it's created by the manufacturer, so only compares models for that one brand, and doesn't always list the feature you care about either.)
Random people actually film themselves unboxing and using the product, and you can watch what buttons they have to press, etc.
Also you can virtually always download the manual as a PDF.
Of course that's not a list, and it takes a lot of work. It's deeply unfortunate -- somebody like Amazon could actually implement the kind of comparison matrix you're talking about, but they're not exactly innovating on the UX front. :(
(Amazon does sometimes show a comparison matrix of 4 products with something like ~6 rows of features for some products, but I think it's created by the manufacturer, so only compares models for that one brand, and doesn't always list the feature you care about either.)