I am 50:50 they both look nice in their own way.Your original wheels as is, looks better than painted all black. Diamond cut design stands out better.
19's 🤣 i can't even keep 18's in 1 piece 🤣Personal preferences.... =)
Given that it's an 18" wheel, the black ones will look smaller , while the diamond cut ones will stand out more.
If the wheel was 19", I would go with the black wheels.