They will both work but are really two different products and applications.
I use NL on the inside if you put down two applications it will really shine, or you can buff and that will tone it down quite a lot. On lighter color cars I do not buff so that makes the lighter colors stand up a bit more.
The TR I use on plastics but this is on the outside mostly, some inside stuff but I do not use this as a vinlyn dressing, its more of a specalized application for me.