You misundereadwronglyed that.

Not N9 vs GSII, but newegg vs othereggs.

Once webshop 1 and webshop 2 starts actually start selling the N9's they've had for preordering, and webshop 3 and webshop 4 start selling them too, the price of the N9 will drop on both webshop 1 and webshop 2. It's often a two step process with preorders:

1: Put out a guesstimate price, allow preorders with a price reservation.
2: Revisit the price once you know your in price.

Once it's out of preorder phase, there's a 3rd and 4rd step:
3: Compare your price to your competition
4: gosub 3;

Webshops compare prices. Once they know their margins and their competitors prices, they know how much they can and/or need to cut.