Which firmware version should I use (N1148T-ON)?

Hi,

i want to update the switch i found two firmware options. Which should I use?

(1) Dell EMC Networking N1100-ON Series Firmware version 6.7.1.17

(2) Dell Networking N1100-ON Series, Firmware Version 6.8.0.1

Support for PowerSwitch N1100-ON Series | Drivers & Downloads | Dell Anguilla 

Thanks.