People have the potential to be equally cool or annoying no matter where they are from.  Personally I think it's an even match when I add it all up and adjust for percent of interactions I have with each.

in my experience expats worse attitudes, locals worse manners , expats and local men are equally annoying, self righteous attitude hands down expats

I totally concur with DaBen. Maybe, sometimes we feel the Chinese are ruder but I think that is because our cultural sensibility is not familiar with their manners. However, I have to confess that in my experience, the Chinese in Hong Kong are more friendly and easy going than many of their mainland’s counterparts.   

expats hands down.  ive never met so many arogant, self righteous bunch of a-holes in a single place.

Locals are more rude and from a Western point of view have worse manners BUT they have not been brought up with a culture that expects and respects manners and politeness. Westerners have and so it is more of an annoyance to me when they (and many do) forget what I think is important because they are in a country that has less expectation on them to behave correctly. as far as self righteous goes the Western people who have this attitude are right up there in the dickhead dept.

expats are rude about them when locals arent around... and locals, im sure, are hella rude when we turn our back (even though they are kinda rude to our faces in public transport just thinking we dont understand chinese)

In terms of flat out rude I'd say locals. But, what we consider rude, they don't, so you gotta cut them some slack. 

I've had Chinese people who I've never seen before grab my arm and scream, in my ear, "Why are you ocean ghosts so stupid?" And laughing their asses off.

Chinese, no question.