The title says it all. The vertical in question right now is Sweeps and I'm doing kind of ''answer questions to win'' angle
Nope.
Sometimes if the lander looks more similar to the offer it will do better, sometimes it wont.
You would always test without this assumption, otherwise you're leaving yourself to get stuck in a very narrow-minded testing approach.
Really, the overall design, appeal and ad copy of the lander, and its congruence with your ads, is more important than if the lander is seamless with the offer. Ideally you would tick all boxes, but this isn't always possible and shouldn't be a requirement for testing things.