Everspring AN157 plug switch shows as ZWave, not ZWavePlus

Hi,
I have a few Everspring AN157’s. They all work fine with Hassio and my AeoTec Gen 5 USB stick, however, in Hassio they report as ZWave Plus = False. All the packaging says ZWavePlus.
What’s the difference and should I care?
Does it mean that the bandwidth is less and I should ensure that these devices are on the edge of the mesh as they won’t be able to act as a ZWave bridge to other ZWavePlus devices?
Regards