It definitely IS the same bird - I saw it today.
And, apart from other pretty obvious things like the extensive blue 'cap', as opposed to just a 'peak' on Fujian, it really does have a different jizz from Fujian. I've seen about half a dozen, or maybe more, over 26 years in HK, and though one or two have just been glimpsed and must have some element of doubt, seeing this bird has persuaded me the others were mostly/all Fujian. The wings are shorter and the tail is longer, and the bird seems 'dumpier', more like a sort of fat Robin-like shape to me.
At least I think so!