PSP is probably your safest bet, since its been out longer and everything is already figured out. Its also well made, powerful, and stable. Especially compared to these type of devices.
I had a Dingoo A320 and a CAANOO. Both awful names for really cool devies. The A320 was cool because it was really compact and super useful as a multimedia device and a good emulator. It also has a decently sized fanbase. Though I had to install linux on it to get the most out of it and it liked to freeze up on me constantly. I ended up caring a paper clip with me just in caseI had to press the damn reset button. I wasn't as in to the CAANOO. It was bigger and had a weird concave analog nub instead of a dpad. Though it was better for some games and easier to set up.
I'm a fan of these weird little devices, so I did some Googling to see what was up. Both of them are basically wanna be successors to the Dingoo. Its seems like the A380e is actually is a shady repackage or a scam ,but the actual A380 is alright but has to ceased to exist. The GCW-Zero wins by default and actually has decent to great reviews. I still recommend a PSP but I could see myself picking up a Zero if it was cheaper.