Halo is not the best shooter out there, but it definetly is not on the same level as Killzone. That's a pretty low insult, and a false one in truth. Halo series has been a lot better than the Killzone series, and from my opinion of Halo, this isn't looking to great for my thoughts on Killzone.
This is why I always wonder why there is so much hype for KZ2. I guess with shooters nowadays, quality doesn't even matter.