So over break I am hoping to complete DP for the last two achievements, but I never play hard mode on any of my other games. How different is it compared to easy? What are some of the things they changed? Thankies.

The enemies take a lot more to kill. But with the infinite ammo versions it gets easier.

Well compared to hard I have to say the enemies on easy are no threat at all!

On hard be prepared to make a lot of swings and headshots to bring them down. Like Vyse Hazuky said once you get the infinite items it doesn't matter quite as much but it can get difficult if there's a swarm of Shadows!

Enemies are stronger? Coolio.

What about York? Does his stats decrease faster, like for sleep and food?

^I don't think so. I think it really only affects combat.

Nope the difficulty setting only effects combat

Sweeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeet.

Pretty soon I'll be getting the poor man's HD TV (ie a computer monitor) then I'll tackle those achievements. I haven't touched DP in a while, so I'm eager to play it again!

Yeah, like what other people said, it only effects combat...
The "undead" are much tougher to kill...
The most notable thing I noticed was how fast my health went down! Holy smokes! D:

^^; I haven't even touched the game yet, I've been playing everything else on my monitor (which I think is equivalent to a 720p tv)

I am not looking forward to seeing the shadows and crawling shadows in hi def. For some reason they creep the FK outta me D:

You must play the game IMMEDEATLY!
as far as the shadows in HD... The graphics aren't stellar anyway...