I just bought it, the seller confirmed me , its all the same, only the brand name change, and they produce all of them in the same factory.
See his answer below:
Hello, this is the brand is different, the other 100
Everything else is the same
I have powkiddy logo in stock now
Just change it to logo
We produce in one factory
ME: ok , so they are all 100% the same ? ( all the same: new pocketgo 2, playgo, powkiddy, miyoo mix.. RIGHT?)
His answer: yes
So im happy, datadragon member from dingoonity confirmed me about playgo , pocketgo 2 abd miyoo mix being the same, BUT i was not sure about Powkiddy. Now you can buy Powkiddy one from official Powkiddy shop at Aliexpress and save a lot of money ! 74$CA or 55$US
Thanks for previous help guys !