I have the Rolex Lady Datejust with a 2ct diamond bezel. This Rolex is in stainless. I sold a Rolex Lady Datejust in stainless/18kt yellow gold with a 1ct bezel. I love my Rolex I have now, and for dressier occasions I wear it. BUT I have the 33mm J12 with 2+ct diamond bezel, and I love it the most. The J12 is made in a factory in Switzerland and the ceramic used in the J12 is only exceeded in hardness by diamonds. on the MOHS scale a diamond ranks 10 and ceramic ranks 9. Therefore diamonds are the only material used to work form and polish the every ceramic part for the J12 watch.
The Rolex watch has a much longer history and track record than the J12, but the J12 has been a very strong seller since its debut in 2000.
The Rolex is a great watch, but don't discard the J12 as inferior.