i don´t recall why, but my XPEL PPF installer last year, he told me it wasn´t worth doing black PPF over the black paint. So I went with the uncolored full car. Unless your car has NO Black Pack and you want black roof, of course.
By the way, normal pricing here in Spain for Xpel Ultimate Plus, in full car is around 5.200 Euros, you can even get it 15 % cheaper depending on the location (difference of overhead and labour cost between different regions)
I find it outrageous that in some places in the US they can go over 8.000 Euros for the same product. The real cost of the film for XPel Ultimate Plus PPF Official installers for a full Emira is less than 2000 Euros.