Haven't used Nissan touch up since early 2000 when we got some free with one of the Pathy's and a Pulsar my parents owned but they were a fairly good match back then. Different paints appear different when you try to touch them up though so not every pot of touch up paint will match exactly. Black Subara paint looks a lot like black whiteboard marker from a distance come trade in time, close enough so that the dealer didn't even bother to patch it up properly when he sold it.
No doubt genuine paint is expensive these days but any decent paint shop would be able to colour match and I'd reckon it would be cheaper.