For all intents and purposes, the DigiTech AR1780 and the XHDATA D-808 can be said to be the same radio, with the only difference (apart from cosmetics) being the type of battery used. The XHDATA D-808 uses a 18650 Li-ion cell whereas the AR1780 uses 4 x AA cells. Personally I would avoid any devices using loose 18650 cells due to the inherent fire risks, and hence most of my listening has been on the AR1780.
This is the XHDATA D-808:
And this is the DigiTech AR1780:
FM as well as the airband is supported and autoscan is also supported on all bands. Sensitivity and selectivity on all bands is excellent and much better than the Tecsun PL-360 with the Super Ferrite antenna. RDS is supported and is useful to identify unknown distant stations. I personally feel that RDS should have been included on the Tecsun S-8800 and other high end models as well. SSB is also supported. A bonus point is that the AM bandwidth can be set to as low as 1kHz, which helps to reduce interference when listening to weak signals. On my other Tecsun radios, the lowest I can set is 2.3kHz.
One of the annoying things is that, unlike most Tecsun radios, there seems to be no way to navigate from one preset to the next (or previous), without keying the preset number. Navigating by frequency requires pressing the FREQ key, followed by the frequency, and pressing the FREQ key again, which seems weird. The power button is also used to set auto-power off duration, so sometimes you might inadvertently set the duration to, say, 30 minutes, and the radio would appear to turn off randomly later.
Both radios can be purchased from eBay or AliExpress for around 70USD, shipping included.