For instance, list style tends to look like (from my lovering review) "Silicone, fun shape, increases penis size, masculine color" whereas sentence style might be something like "This is a well made item which enhances penis size."
As a reviewer, which do you tend to use? I definitely use list style. I try to list as many pros or cons as possible so the reader can get the gist of the product without having to read an entire review. It's absolutely a numbers game and I try to say as much as possible because I know many people don't look beyond the summary and pros/cons.
As a reader, I also look for lists rather than sentences. Sometimes folks seem to use sentences in a way that is far too vague or general. Like if they said there's "Too many cons to list" or "Don't even get me started" or "Everything is a pro" - I absolutely have no idea what aspects of the item are good/bad and I have to read the review (especially if it's the sort of item I have very specific preferences about) in its entirety to understand that. To me, pros/cons should be a way to quickly clean information without requiring one to read a review.