By looking at the specs it appears the the only difference between these sets is the Sub. Can anyone who actually knows what they're talking about (I dont!) confirm this?
http://www.energy-speakers.com/na-en/products/take-classic-5-1-overview/
http://www.energy-speakers.com/na-en/products/take-classic-5-pack-overview/
http://www.energy-speakers.com/na-en/products/take-classic-5-1-overview/
http://www.energy-speakers.com/na-en/products/take-classic-5-pack-overview/