Thanks for the additional information on Westin and Pier One. I read somewhere someone did not like Pier One after staying at Pier One and Marriott - I guess different stroke suits different people as the cliche says.
Westin is further closer to the CBD at Martin place. It is really just an urban city hotel for business travelers, similar to the Hilton in my mind.

How is the Pier One location in relation to Park Hyatt ? I am trying from my memory to no avail on the location as pinned by Google Map. Can't remember if it is on the top of a small hill or not. I believe we walked out that direction once years ago when we stayed at Park Hyatt long before its renovation. So it is at least quite some years ago. We have not walked that far out ever since.

PIX posted on TA about the surrounding is indeed a much better surrounding than that of Marriott! But I am not sure about their standard rooms especially those with exposed beams and such...
However the suites with wooden patios over the water are definitely very nice. I would say better than the Park Hyatt opera view room with balcony.

Universal good marks on their breakfast buffet. Assuming this is among the Plat amenities.

I notice Pier One rates would go down quite a bit at close in. Seems very good value if one can take advantage of such versus using points.

P.S.
On TA some said the AC system is not strong enough for Summer heat. That would be an issue for our stay in Nov.

But your post now makes me seriously consider Pier One over the other 2 properties.