Usually , square bathroom basin sink will be a little higher price than a round one with same size. Why? That is big matter for square bathroom sinks are relatively lower good rate than round bowl.
It is difficult to control the square basin sides straight and not out of shape when high temperature fire. The good rate will be 5% lower than round basin bowl . So the price will be higher than round bathroom sink.
The another matter is people more like square one than round one design. More people like than price will be more expensive too.
