There is only so much you can compare between DLR and WDW because they are not the same. I'd put Spring Break vs. Spring Break, etc in the category of can't compare. All the times your listed will be extremely crowded. Except for the week between Christmas and New Years there will be days and times during any week where it is more or less crowded. They can't always be predicted. Usually going at rope drop is a good strategy. Other than that, prepare for crowds and be open to switching your schedule as you tour. That's the only way to deal with those times of the year.