2018 XPROG-M V5.84 can support read write some more chips than XPROG-M V5.74.
However, if you want to read write EEPROM brand 8pin chip, you can choose XPROG-M V5.74, XPROG-M V5.84 can’t support.
XPROG-M V5.84 adds much more authorization:
Good source of Xprog-M:
XPROG-M V5.84
http://www.obd2shop.co.uk/wholesale/latest-xprog-m-v584-with-usb-dongle.html
XPROG-M V5.74
http://www.obd2shop.co.uk/wholesale/xprog-m-v5.70-ecu-programmer-with-usb-dongle.html