According to Tiffany, they are allowed to put their logo to all other Pateks except Grand Complications. Still they sometimes, "by accident", print also the Grand Complication; mostly perpetual calendars.
Some people like Tiffany logo and are willing to pay more. But does Tiffany logo influence to the value - I do not see how.
I have 5167A with Tiffany dial and I enjoy it because it reminds me about our nice trip to Hawaii from where I bought the watch.
Best, Kari