Is it worthy to go shopping at North Point or should I go search for a great bargain in MongKok?

If for Nike products on sale, neither of these places are good. Here are two relatively cheap places:
1. Citygate nearby Tung Chung metro station. There are discounts all year round.
2. In Kwun Tong, there is a nike store affliated to the factory, so it is cheap. It's close to B2 of Kwun Tong metro station.