Killzone 2 or Halo Wars: Which will sell more and by how much?

[cool48]

^^^Halo Wars...

 

On Topic: I really don't know about this one. If I'd choose one though I would have to go with Halo Wars just because of the name.

 

KZ2: ~700k WW first week

Halo: Wars:  ~800k first week (Complete guess, I really don't know what to expect from this game in terms of sales)