DL has it's a small world holiday and Haunted mansion holiday, plus the christmas fireworks, and snow and christmas parade. Then generally have christmasy food, snacks, etc.
CP is usually the 2nd weekend in Dec (though not always) and it not like the one at WDW. WDW was started for guests after DLs popularity, DLs is still mostly for CMs as it always has been. They've actually changed it back to the xmas tree in front of the train station. CMs are given tickets, and then they do give others out on a first come first served basis to guests. You can line up along mainstreet to see the processional down mainstreet without tickets, they're just for the reserved area.
DL will have regular hours up till the week before xmas then hours will be exteneded. One week (usually first or second) in december usually a mon or tue DL will close at 6 I think instead of 8 for the CM party. xmas week and NY week will have extended hours and be extremely crowded. the whole month of dec will have fireworks and parade every night