Sat nav difference?

Is there a difference between sat nav and sat nav + ?
The question relates to a mk4

Do you mean Sport Nav & Sport Nav+? The + means that it’s homologated to later emission regulations WLTP or something or other. The spec may be slightly different too depending on the specific age.

Thanks Robbie,I understand now it’s the later 184ps engine

Also, the + models can be upgraded to Android auto and Apple carplay. I’m not sure about earlier models.