The MC2207310 has QSFP on both ends and is a complete solution to connect QSFP to QSFP. The cable is offered in various lengths. The part # you mentioned is 3m cable.
MC2207411-SR4 is a QSFP optical module with MPO connector and would require an MPO cable to be attached in between a pair..
here is a link where you can find out more about the optical modules we offer:
http://www.mellanox.com/related-docs/prod_cables/PB_Active_Optical_Modules_QSFP_SFP_SFP+.pdf