The dial of the 5970P is too busy for me due to the addition of the PC data of course. The dial of the 5170P breathes more despite is dark blue dial.
More specifically, this dark blue dial is truly beautiful and I’m absolutely not annoyed by the diamond indexes. In my opinion, they really add something and the play with the light is probably amazing.
As you already own a 5960 with a white dial, I think the 5170P is a good “complementary” Patek timepiece vs the 5970P.
As I usually say, let your heart talk and you will take the right decision.
Just my two cents.
Best wishes
Alkiro