Testing in action, love to see it!.
Perfect example of what I just mentioned in my SN post about early iterations 👏

Landing Page

• Prefer A but I would collapse the height and do away with 'the fold'. They by device. Encourage people to scroll by showing more of the content below.
• There is plenty of space too for suggested / popular / trending searches - to reduce the amount of thinking people need to do to get started.
• Might prefer B if it was a simple coloured background and was shorter in height. But CTA for searching is far less visible and likely to perform worse.

Explore

• Prefer B but the caption text on each card is perhaps too wide to read and the content is somewhat merged together. Would prefer to see these as cards, with multiple lines of body text that aren't full width.
• Search relevancy % - to know how close to my target topic the result is.
• And perhaps show 'top', 'trending' or 'recommended', keyword or author tags to again make it a more easy decision to choose favoured or popular content.

Benefits

• Prefer B because the cards should almost always be lighter than the background.
• Love the colour transition but you may need something in the hero area to make sure people find the content below it.
• There should also be one BIG CTA on this screen. Not seeing what action I'm supposed to be taking.

Footer

• Like the style. I would choose one CTA and stick with it. Not clear whether I should give feedback or give my email.

Search Bar

• Looks great! Are each of the tags coloured? Is it clear enough I can deselect one (there's no x icon)?

Search Page

• Looks & feels familiar. Nothing significant to change. Just might want to include imagery from from each piece of content and to somehow link articles together if they are of the same topic / theme.

Overall

• Great job on the design. Looks like a super useful tool.
• Consider the customer who is using this page. They are bitcoiners and likely care a bit about their privacy. Might be useful to share information that not tracking anything.
• They might also want to join trending topics & discussions, rather than reviewing stale content, so this would be a useful addition.