If you don't the open top and don't live in a rainy city I'd go for NF. Celine is so long that you have dig deep for small things, plus the space on top is wasted unless you fill it all the way to the top. On the other hand, NF's east west design offers you more usable space, and you can shrink the tote by tightening the side straps.
I have realized that east west bags' weight, when full, feel ligher and more comfortable than north south ones.