I think the discrepancies you guys have mentioned emerges from the fact that the selection stages vary a little between local candidates (or candidates interviewed in HK) and international candidates (candidates who have their initial interviews overseas).
I believe that if you make it through the entire selection process, by the end, the tests and interviews you would have gone through would be the same, regardless of which pool of candidates you are from.
Reasoning test is, as mentioned above - filling in the next shape. Numeracy test involves basic subtraction.
Hope this helps.