If we're talking areas that have been finished in ZC primer only, as opposed to those painted in the particular colour of Interior paint, then yes, there's a lot of difference. It depends on the manufacturer and 'mix' of the ZC, how it's applied, and by which aircraft or component manufacturer. Application can be by dipping, heavy brushing, or spraying, for example, and coatings can vary in 'thickness' depending on requirements, thus giving even more variation.
I normally just mix my own and, depending on the aircraft type, I might add a very tiny amount of silver - just a brush with the silver wiped off - to give that slight 'thin', metallic look sometimes seen on certain ZC applications, be it yellow, yellowish green, greenish yellow, or green.