User blog comment:Callofduty4/Why is it a sin for Treyarch to rip some aspects off of Infinity Ward but OK for Infinity Ward to rip off some stuff from Treyarch?/@comment-154115-20091223190334

Id have to agree, plus, its all in the same series, you dont want a dramatically different game every other year to play thru. Most of us prefer consistency; it's better just to treat Treyarch as the same company as IW, instead of them stealing content from each other to work on their own series.