Whether the Halo 3 sniper is harder to use is entirely opinion, because as I stated before, I can snipe people in my sleep in Halo 3, but would rather not pick up the Reach sniper if I don't have to because I'm not as good with it. I don't know how to prove that I'm worse at it than a silly 1v1 challenge of some sort where I play someone in both Reach and 3. I have never heard
anyone describe the Halo 3 sniper as hard to use or a skillful weapon to master until today.
There is nothing they added in Reach to make the sniper rifle easier to use. The magnetism, aim assist, and so on and so forth are all carried over from 3 with a slight reduction in firing speed. Neither of them have recoil, neither of them need to be led, and neither one of them has any appreciable bloom whatsoever.
Once again, if you don't like my posting style, click
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If they want to make the sniper actually harder to use, they can add recoil. As it is, it's functionally similiar in both 3 and Reach, was exploitable with sweep snipe in Halo 2, and was more difficult to use in 1 than any of the later games, IMO.