It's impossible to say definitively which continent's surface is "similar" to another without being more specific about what we're comparing. Do you mean:

* Geologically? In that case, continents like North America and Europe share similarities in their underlying geology, as they both have areas of ancient cratons, mountain ranges formed through plate tectonics, and sedimentary basins.

* Topographically? If you're looking at the overall shape and features of the landmass, you could compare continents like Africa and South America, which both have extensive plateaus and mountain ranges.

* In terms of vegetation? Continents with similar climates, like North America and Eurasia, can have similar types of vegetation in certain areas.

* Regarding population distribution? Continents like Asia and Europe have large, densely populated areas and also vast, sparsely populated regions.

To give you a more accurate answer, please clarify what aspect of the continents' surfaces you're interested in comparing.