Purple haze is a jimmy hendrix song, fucking leave it at that lol.
Every single seed has it's own genetics, even if they come from the same plant the seeds will share different traits of the mother and father plant.
Smell
Yield
Grow rate
Node spacing
That only scrapes the surface, genetics are a gnarly subject to get into.
Simply put, the only way you can have guaranteed genetics are if you took a clone form a mother plant that has confirmed genetics. There is no clone of "Purple haze" that I or any grower I have ever met knows of.
You can make your own purple sativa strain and call it purple haze, which is probably what these guys did. The buds are obviously indoor quality, but the density shows that the plant either wasn't properly fed (which is unlikely given the mass of trichromes) so my guess is they crossed two similar strains and the result was a female seed that did everything except producing dense buds.
That's what sucks about seeds =\