Some TI switches and multiplexers have orderable part numbers labelled with an E4/G4/G3 suffix. There is no difference between a device labeled with an E4/G4/G3 suffix and one without the label. TI.com highlights this in the ordering & quality section on a device product page:
Historically, E4/G4/G3 suffixes indicted that the devices were “Lead Free” or “Green” but now all of our switches and multiplexers meet these standards. TI has continued to make these orderable part numbers available so that customers have consistent orderable part numbers.
To check on the "Green" status of a part, you can put your part number into the search at the following link:
For definitions of E4, G4 suffixes, please refer to the following:
Environmentally Friendly Solutions from TI
You can also refer to the end of the datasheet in the Part Orderable Addendum to see the "Eco Plan" of a specific part orderable.
The electrical specifications for every device listed in the orderable addendum is that listed in the datasheet.