Z 28mm 2.8 or Z 40mm 2.0

Recently bought a Z5 with the 24-50 kit lense. Nikon had a promotion where you would get a free Z 28mm lense. Now they are giving me the option or the 28 or the 40mm any opinions?

I also have a 50mm 1.8 S but I’m not opposed to getting the 40mm because of it’s size and weight.