I Have only ever played mw3 and bo2 I get high gun streaks in bo2 but really struggle to get a decent gun streak going on mw3. Do I just suck at mw3 or is it a harder game to play. I no there different games but irs the same principals right? I
MW3 was/is killstreaks. Blops2 is scorestreaks. It's a lot easier to get higher streaks in blops2. You get points for everything. You just have to stay alive long enough to add them up.
That all depends on you adapting to each games differences.
Neither is harder or easier. Just different.
I'm sure with enough time played, you may be able to achieve what you wish in either game.