The Breguet, while overall nice, has always bothered me with its date intruding into the dial so close to the 3 o'clock numeral. I personally feel that the date alone has knocked the beautiful enamel dial back a few notches.
The movement of the Breguet is gorgeous, but I still prefer the classicism of the Patek's movement.
If you wear them little, I would favor the Patek as I feel it is potentially more versatile.
A simple strap change can dramatically change the overall look of the Patek, less so for the Breguet IMO.
Finally, I favor the hand winding nature of the Patek movement, which is less common given how many watches are equipped with an automatic movement.
Good luck with your decision.
Cheers,
John