The weekend, in summary:
The Patriots basically swapped Ty Warren for Shaun Ellis, and TBC for Mark Anderson and Andre Carter.
Warren and Ellis both had some positional flexibility. But, with Warren a good 20 pounds (listed...) bigger than Ellis, Ellis can play 3-4 DE and 4-3 DE, whereas Warren can play 3-4 DE and 4-3 DT. If the Pats are planning more 4-3, Ellis is probably the better fit.
TBC, Anderson, and Carter are all edge rushers. Anderson and Carter are both more in the Pats mold, although TBC had more experience in their (former) system. Anderson and Carter both probably have an athleticism edge over TBC. All three have had up and down careers, swinging wildly between 2-3 and 10 sack seasons.
Both deals swapped a player familiar with the Pats system for an older veteran without experience with the Pats - some risk. Both deals, however, added some athleticism.
Neither added a premier player, but both were probably minor upgrades.