Crowds are different at DLR. Since the parks are side by side, they are more fluid. It's harder to escape a crowd by finding a park with lower wait times. Avoiding the park on early entry mornings doesn't help because the crowd is so fluid between the 2 parks. Party days are not low crowd like they are at the MK.
Walkways are more congested. They are smaller. There are fewer FP attractions.
The massive difference in DLR AP base also affects crowds. AP holders are happy to camp out for a parade many hours in advance because they can do rides another time. DLR is much more of a locals hangout than WDW.
Busy and less busy times are not the necessarily the same as at WDW. They are heavily influenced by AP blackout dates.
For all of those reasons, I think SWL will have a much greater impact on the parks at DLR than at WDW. Imagine having SWL plopped down in the middle of the MK. That's the main reason our own travel patterns will likely swap back to WDW once it opens. That park will not be able to absorb those crowds. At least at WDW I can choose different parks completely that aren't side by side.