The main difference is that there are typically even more people sniping in HC mode since it's even easier than it is in core. Also, all of the optical sights are mostly fubar'd and friendly fire is a major factor when playing with a team full of idiots.
"Frankly,... watchin' Donny beat Nazis to death is the closest we ever get to goin' to the movies."
I go to get stars for guns i dont like or suck in core.
I end up sniping cause of the guys that think they are leet with 5+ gold stars on an m95. I pull out my m24 and just go to town, no killcams so its pretty funny outsniping people and still getting the marksman headshots on them.
"Do you feel better after denigrating that imaginary person you dreamed up for the sake of a self-righteous rant?" -TheMarkyH