No worries BB,
The 'same factory, different door' biz happens a lot in China, so it's no surprise that Jialing Honda is no exception.
What you say about tightarse buyers and servicing makes a lot of sense, too.
I reckon between us we've spelled out all of the re-engine options, so Llew can make an informed decision.
From what other Chonda owners have said though, these do need a full service, including valve clearances, before use.