I agree, that old 16 Bit games look significantly better on CRT Monitors than on LCDs TVs, cause that's the way they were designed to be played. Arcade games benefit from CRT Monitors too.
But Nhut is right, the signal, the monitor gets from the Dingoo is no RGB signal. Nonetheless, cause a Philips CRT Monitor produces a better picture, than the average CRT TV, I can imagine, that many games (not all, definitely not VCS 2600 or other 8 Bit console games, that were designed to be played on a CRT TV from the early 80s) will look better.
Definitely every CRT is superior to an LCD when it comes to displaying 8 and 16 Bit games, at least, if you don't have the hardware capacity to work with ressource hungry filters like the CRT simulator in Stella.
If you are interested in this topic, Ian Bogost documented the work of his students on their CRT simulator for Stella, you can read it here
, he explains some reasons, why old games look so different, many times inferior on modern LCDs.