For a leisure stay in November, after researching threads here, top SPG choice would be the Park Lane at 127.65 pounds including breakfast. We decided this would outdo the Belgravia at 148.94 pounds with breakfast.

How does this stack up as against the Trafalgar or the Langham at 169 and 159 pounds, respectively (breakfast would be included due to status)?

This is a concert/theater long weekend, I would say location is important to us, followed by suite possibility (SPG plat, Hilton Diamond).

London is such a tough city to choose a hotel in. If anyone has stayed in both SPG and Hilton brands mentioned and has any input, I'd appreciate it.