The Browns are the antithesis of the Texans when you think about it.
They are named the "Browns" after Paul Brown, vice president, general manager and head coach of the team. Some say the nic "Brown Bombers" (the plural of boxer Joe Louis' nickname) influenced the public's decision, but regardless, it's a grassroots and location specific name connected to local history. And, of course, Paul Brown is regarded as one of the greatest coaches in NFL history, often referred to as the "father of the modern offense" for all the significant improvements he brought to the sport. The seeds of the modern NFL go back to Paul Brown. So the name of the team, along with the unassuming style of the bland helmet, actually mean something.
Then we have the Texans, whose entire history is deeply rooted in executive board room decisions heavily influence by modern corporate marketing strategies. While we look at the surface and see gloss and glitz, especially compared to the mundane look of the Browns helmet, the fact of the matter is that the Texans colors, name, and logo are shallow, while the Browns are deep in meaningful history of the league itself.
It is certainly ironic, and I have little doubt that all of this influenced those that made the decisions with this list, as well.