Hi Justin, SE has Dual springs with full length guide rod also it has the XD Essentials package which contains one 7 round flush fit magazine, one 8 round magazine with X-Tension, a bore brush, cable lock, owner's manual and plastic case. The S model comes with 7 Round and 9 round magazine.

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The e stands for essentials package XD Essentials package contains one seven round flush fit magazine, one 8 round magazine with X-Tension, a bore brush, cable lock, owner's manual and plastic case The SE has a Dual spring with full length guide rod and Includes

The SE has a Dual spring with full length guide rod and Includes: - XD Essentials package contains one seven round flush fit magazine, one 8 round magazine with X-Tension, a bore brush, cable lock, owner's manual and plastic case. (Accessory items are similar). The S has comes with 7 Round and 9 round magazines.