Both are enamel plates. What are the differences between Patek Philippe and other brands?
The enamel dial itself is not uncommon; top brands are all producing them. However, the enamel dials of Patek Philippe are often significantly more expensive than those of their competitors, and they are also much harder to find. The difference lies not in “whether there is enamel” but in “who is doing it and how crazy they are about it”.