Page Comparison

https://www.juniper.net/documentation/en_US/release-independent/junos/topics/reference/general/uplink-module-ex4200.html

EX-UM-4SFP   ( 4x 1G )

EX-UM-2X4SFP    SFP+ uplink module ( 2x 10G 10G  or 4x 1G) 

EX-UM-2X4SFP-M

EX-UM-2XFP

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https://www.juniper.net/documentation/en_US/release-independent/junos/topics/reference/specifications/uplink-module-ex4300.html

EX-UM-4X4SFP  >>>> Uplink Modules in EX4300 Switches  ( 4x 10G )  

EX-UM-2QSFP   2x 40G

EX-UM-8X8SFP  8x 10G

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