Well to be fair a black car hides a lot of dirt and grime maybe giving the illusion it's clean, white on the other hand, shows absolutely every little thing and I'm still struggling finding the perfect product after 1 year or searching.
Also there's different types of clear coats shops use for a matte finish, my car isn't even matte, it's a satin or semi gloss finish, right in between matte and gloss but the texture is the same as matte, all pores where dirt can get into easy and really stick.
Anyway the last thing I can think of as well is a lot of drift or beater cars are just spray bombed like Tofu said and it's just paint without any type of clear coat, so there may also be a difference there.
damn this Lambo is seriously perfection on 4 wheels, I hope I can afford one just like this in the future, dream car for a long time for me and that's exactly how I would modify it.
(oO:::\___/:::Oo) (DPE-wheels) // Satin Cocaine White