Have both the Distance-RC beacon and a RF-V16. I plan to fly with both as they are small and don't add much weight.
However they are very different, constructed with different purposes and goals. The China GPS thing is a pita to setup and can fail in so many different ways. No cell reception, no GPS, no power, trouble with the SIM-card/subscription/settings. But when it works its very convenient and an efficient device to get the position.
In comparison the beacon unit is foolproof: you connect the battery to the device and it starts doing its thing. For weeks on one tiny battery! Sure, range is somewhat limited. But if its easy do do a rough search doing a checkerboard pattern over the area, provided theres roads. And it works with a toy walkie talkie! Can't find it? Then borrow/buy more powerful stuff such as a Baofeng 40$ radio and a Yagi. That will give you way much greater range. (Don't get a cheapo china 15$ yagi, that one won't work, tried that one.)