AP and ORI has no different at all, except warranty term. Ori can claim warranty at all Nokia Care Center, AP only can claim from AP company u buy from.
The restriction to get AP, is only warranty term. Some AP company might dunwan take responsibility when ur phone got problem. they will give u those lame excuse, like ur phone drop, fall in water, damage by urself, and so on...
If the price range between AP and ori is not much, then go for ori.

just wanna add on...

for AP set, if u update the firmware, it may not have support for the local language, UNLESS the AP set is within this region..for example, AP set fr germany may only has got french,german,english..NO mandarin, NO BM..