Anyway my view of the SYD starwood is that both SOTP and Westin are equally good and it can be a toss of the coin, red or black etc. However as they are IMO equally good, it comes down to decor! Do you like Sheraton's style? or Do you like the Westin's decor?

The 4P on the other hand - although a good hotel - is not in the same league as the SOTP or the Westin. I do have good experiences with the 4P Sydney including welcoming letters from the GM plus wine and cheese platters in my room.