10G SFP+ experience from the development of 300Pin, XENPAK, X2, XFP, ultimately with the same size of SFP, and transmit 10G signal. SFP With miniaturization cost just right to meet the demand of high density optical equipment modules, it began in 2002. It has been replaced by the XFP and to be the mainstream market 10g transceiver in 2011.

The advantage of SFP+
1. SFP + has encapsulation more compact shape dimension which better than the X2 and XFP (the same size as SFP);
2. It can connect the same type of SFP, X2, XENPAN directly
3. The production cost is lower than XFP, X2, XENPAK.

The different between SFP+ and SFP
1. SFP and SFP+ have the same appearance and same size
2. SFP protocol specification: IEEE802.3, SFF-8472

The different between SFP+ and XFP
1. The SFP + and XFP are both 10G optical modules, and can connect other types of 10G modules
2. SFP+ is smaller than XFP
3. Because of the smaller volume, SFP+ transfer signal modulation function, serial / deserializer, the MAC, clock and data recovery (CDR) and electronic dispersion compensation (EDC) function from the module to the Lord on the card
4. Compliance agreement of the XFP: XFPMSA agreement
5. Compliance agreement of the SFP+: IEEE802.3ae was added for the SFF-8 431, SFF-8432
6. About the design: SFP+ is more mainstream than XFP
7. SFP + protocol specification: IEEE802.3ae was added for the SFF-8 431, SFF-8432.

If you want to get more information, please turn to the fiber optic equipment lists to compare.