Blond Pastel vs Pastel?

So I was at MARS yesterday and a vendor had a few blond pastels and a few "normal" pastels on display (among many other cool morphs).

I asked what the difference between them was and he said it was mainly just the genetics although blond pastels sometimes hold their yellow a little better...

Any more thoughts on the matter? I'm still a little confused because as far as I could tell, the two blond pastels looked exactly like the two normal pastels :P

All pastels are exactly the same. Just pick one you like and don't worry about which line they are.

yeah , all pastels are the same.
only the super pastel is very blond respecting normal pastel , but there's a big difference and you know immediately the difference between pastel and super.
As told by pfan151 , there's various line of pastels.

Aaaah so its just a different pastel line. I thought it was a different morph or something.

Thanks for clearing it up :)