Those rankings cover a lot of areas within CS. I noticed U. Illinois Urbana-Champaign ranked # 2 between Carnegie Mellon and MIT.
It would seem NE has better CS than Tufts, for instance. Some will prefer Tufts for other reasons (if they want to be in Boston). The posts I found would support NE for the most part. Tufts is generally more selective, higher graduation rate, more go on to grad school and so on but NE looks good for computer science, has business, and has the COOP.
Compare Northeastern University vs. Tufts University (collegesimply.com)
Northeastern vs. Tufts, CS : collegecompare (reddit.com)
Northeastern vs Tufts please help!!! : NEU (reddit.com)
Compare Northeastern University vs Tufts University (collegedunia.com)
etc.