I am trying to answer the same question.
The last three characters are the country code, see
https://www.netzsieger.de/ratgeber...I assume that the QE for 2400.- is delivered with the Swiss country code.
The XXH for 1400.- with the country code XH for various countries.
The difference is probably in the analogue network type:
Switzerland: DVB-T2/C/S2 other countries with XH:DVB-C/S2/T2x2
The question is do you still use DVB signal, i.e. aerial cable, or do you stream everything via the Internet anyway? The more expensive Swissedition certainly has everything integrated... the cheap one certainly doesn't.
Chat GPT on this topic:
DVB-T2/C/S2: Standard devices with support for terrestrial, cable and satellite reception.
DVB-C/S2/T2x2: Devices with the option of a dual tuner for at least one of the transmission types or extended reception functionality.
If you are considering a device with such a designation, it is worth taking a look at the technical specifications to understand exactly what advantages the x2 offers.