Even with the Drought of 2012 the USDA is forecasting an increase in U.S. cotton production and a 46% increase in ending stocks to 4.8 million bales. Oversupply concerns will continue to keep December Cotton range-bound. Cotton has little incentive at this time to move higher because of heavy supply and weak demand.
So to answer the question regarding what is heavier, with all of the comments from above I have to say cotton. Have a prosperous trading week.
To see my market views daily you can follow me on Twitter at http://twitter.com/TrendsinFutures