> Don't we group all these processors as "ARM?"

I don't know about others but I only group processors as ARM which are ARM ISA compliant. I don't know which ISA spec this "UV131" chip follows, so for me it could be ARM, MIPS, x86, PPC or whatever.

> It looks like it might be the same gear used in this generic Shenzhen mini-tablet.

Nice find. Unfortunately, also this page doesn't give any substantial clue in terms of processor ISA. However, deducing (kind of) from the fact that most tablets have an ARM processor we might conclude that this "UV131" chip is probably based on ARM ISA as well. But there's still the chance it's something else.