15451ST.ZZ.1256ST.01 vs. 15451ST.ZZ.1256ST.02

[SS1]

Good day Gents

I am considering a purchase that id quite frankly like to understand a bit more before pulling the trigger, the following RO models are my options:

15451ST.ZZ.1256ST.01 - Black Dial, Diamond Bezel
15451ST.ZZ.1256ST.02 - Grey Dial, Diamond Bezel

Kindly let me know if the Grey Dial is a superior product, i am told it is more rare and difficult to source, whilst the black dial is more readily available. Theres a price difference of approx. 23%; although i do like the black dial on the wrist, i want to be sure its the most sensible decision.