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I have figured it out. In case somebody has the same issue:
There were four options in Astra Settings that had to be changed for the page to get the same look. I have compared the setting from original page created through Starter Templates with the page created manually. Changed them for the page accordingly, and it works.
To avoid changing them for every page, I have set those options as default in Astra Options in Dashboard. Now every page can be created by importing a page from template kit.