Park
547
Patek 5227 vs. Rolex Day-Date 40
Assuming you mean the Day-Date 40, I think you'd find that it looks slimmer and more elegant than your Sub, while the 5227 might look surprisingly large because of the thinner bezel and the lug structure.
You use the phrase "dress watch," to which people attribute diverse meanings. I have a Day-Date 40 in platinum that I've worn with a business suit or sport jacket, but I don't consider it a true dress watch, primarily because of the bracelet. The President bracelet is very comfortable and catches the light nicely, but it calls attention to itself, which is one of the reasons I don't consider it a dress watch. A fluted bazel would magnify this issue.
Park
I am presently looking for a dress watch and have narrowed it down to the following:
Patek 5227 either in WG or YG Rolex Day/Date/Pres in WG --------------------------------- It could very well end up being a daily wearer but checking on the size difference as well. I do wear a no date Sub at 40 mm which is perfect for my wrist and wonder...
It depends on your lifestyle
Patek: more subtle and more delicate (less WR, leather strap) Rolex: iconic duo with your Sub, robust You can't go wrong with either but I particularly like the black dial Patek 5227...
Patek 5227 vs. Rolex Day-Date 40
Assuming you mean the Day-Date 40, I think you'd find that it looks slimmer and more elegant than your Sub, while the 5227 might look surprisingly large because of the thinner bezel and the lug structure. You use the phrase "dress watch," to which people ...
I'd go with the Patek, especially since you already have a Rolex
The Patek also has far better movement finishing