My quest is when we done the newbie story then we have to talk to 2NPC, left npc will call you go to the WP and then right npc will call you go to ice island, but how to choice this please and what the different between their plz ? Is't one npc for pvp play ?

Well, one is place is a desert...the other is Winnipeg during a snow storm. Niether is a PvP zone (you have to que up for those)...so you won't get your scrawny newbie behiney ganked by a lv 896 Tauren Death Knight if you chose the wrong one...if that's what your thinking.

I like Steelhead in Canada because it looks cooler.

They just lead to two different areas with two different quest lines. Pick which ever sounds like more fun to you. Then when you play an alt, pick the other one to do something new.