So to say it has nothing to do with the original Dingoo A320 is simply false.
saying that the a320 and the a380 are hardware-related because both share ingenic socs is equivalent to saying that the ga330 is related to the iphone because both were made in china using arm processors
as for software, one comes with their own modified flavor of dingux while the other sports micro c/os-ii as its operating system -- the a320 NEVER came with dingux and chinachip NEVER provided any kind of support or help to the whole concept of installing an alternative os to their product. dingux is pure 100% homebrew to the a320. incidentally, if the dingux installed in the a380 were *that* related to the dingux developed by booboo, it would be fairy trivial to port every piece of software made for it to the a380, thing that has been reported to not be the case on these very forums in several opportunities
at last, and this time i'm taking offense since i thought that you people finally understood about oem mfg in china after the yinlips fiasco, dingoo tech has SHIT TO DO
with dingoo digital, no matter how many times you read somewhere in broken english that this or that guy got fired from/quitted from/stole from/got stolen by someone other. the manufacturer that has been providing hardware to "original" dingoos since the start is GEMEI, even since the first prototype unit!
(and don't forget about the old x760+ that's internally waaaay more related to the a320 than the a380 ever was). this explains the appalling build quality of dingoo tech products (they're depending on another oem to get their goods), the unaddressed 32mb of ram on their own a330, the complete lack of dingoogames bundled software, their NEED to steal dingux in order to get updated emulators for their latest product, and so, and so, and so on...
to say "some sources say this, some say that, nobody knows for sure ERGO dingootech is related to dingoo digital" is a complete irresponsibility that only brings more confusion to an already confusing market. occam's razor heavily suggest that this is no more than just a brand issue. after all, we all know that in china copyright matters, much like the gpl, weigh less than a fart.
tl;dr: i think you're wrong