‘Device’ vs ‘Device Model’

In SDT3.0 vocabulary, a class/type of device is called ‘Device’, while in TS-0023 (HAIM), ‘Device Model’ is used instead. -Theses two terms are interchangeable in principle, and ‘Device Model’ seems more like a ‘type/class’ comparing to ‘Device’.

Suggestion: to change ‘Device’ to ‘DeviceModel’ (or 'DeviceClass') in SDT4.0 -Backward compatibility may be a problem?