I had a hunch about how the two "mini-movements" differed but Kate Zernike in the New York Times did a great job of documenting my simple observations. (Always a good idea.) 
She said it is more that a culture war, "young versus old, left versus right, communal food tables versus “Don’t Tread on Me” flags." Here are a couple of paragraphs, but you really should read the whole thing.
In fact, the two movements do share key traits. They emerged out of nowhere but quickly became potent political forces, driven by anxiety about the economy, a belief that big institutions favor the reckless over the hard-working, grievances that are inchoate and even contradictory, and an insistence that they are “leaderless.” “End the Fed” signs — and even some of those yellow Gadsden flags — have found a place at Tea Party and Occupy Wall Street protests alike.
Where they differ is in where they place the blame. While Occupy forces find fault in the banks and super-rich, the Tea Party movement blames the government for the economic calamity brought on by the mortgage crisis, and sees the wealthy as job creators who will lift the country out of its economic malaise. To them, the solution is less regulation of banks, not more.
Gov. Chris Christie of New Jersey declared Monday, “If you told the Occupy Wall Street people and the Tea Party people that they are the same, they would hit you.”
Thank you Governor, wouldn't want to get hit by either one of those groups.