How Would Plate Tectonics on an Inverted World Work?

Recently, I came across an inverted world map on the MapPorn Reddit made by MChainsaw. "Inverted" as in, the "continents" are now below sea level and the "ocean floors" are high and dry. (Considering that regular Earth is 70% water, that'd be saying a lot.) Here it is:

It is already presented with a realistic range of climate and landscapes, so the question is not on that particular angle. The real question is this: What sorts of differences regarding the crust and/or mantle would be required to create this kind of "Inverted Earth"?

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How Would Plate Tectonics on an Inverted World Work?

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