Which DST should I trade to improve at WR: Broncos or Patriots? Which will have the better season?

I think NE D will do slightly better than Denver's D. But as far as trading one of them for a top WR, that's a stretch unless you are throwing in someone else like J Horn or K Curtis. You do need help in WR. See if you can do the 2 for one (give up one of your D plus one of your WR for a good #1 WR) then you'll have an extra spot on your roster to find some sleepers that might still be in the free agent like Drew Carter, James Jone, Arnaz Battle, Michael Jenkins, Wes Walker, Ted Ginn Jr, Bryant Johnson or Anthony Gonzalez