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But it may be the "better" landing page is less clear, which makes it more frustrating to understand the product, which has a side effect of causing a negative opinion of it. So in this case the landing page is not better because it's failing in it's core job of communicating the product.

It's common design these days to have landing pages that are a giant photo with huge text where you have to scroll for for a mile to be rewarded with nothing but platitudes and hyperbole, one sentence at a time. The simpler page which actually explains the product functionality and the pricing in clear language on one page would be better from the user's perspective.