Read about the results of a test comparing the Topsy Turvy and EarthBox in this article from Popular Mechanics. Note the EarthBox description "a second novelty product." It's safe to say that the EarthBox is well beyond being a novelty with knowledgeable consumers but not necessarily with the media.
Comparison plantings between Topsy Turvy tomatoes, tomatoes grown in a second novelty product called an Earthbox, and a third batch grown in the traditional dirt method popularized over several thousand years of agriculture.
A stormy season toppled the Topsy Turvy, stifling a promising start. Tomatoes planted in the earth survived and thrived.