As stated previously, the colours for the 4250 Castle are different from the 3019 - this is not all that is different. The towers and tower tops on the 3019 are of the typical rigid playmobil ABS plastic. However, on the kitchen, as can be seen in the picture, not only the turret top is of a rubber, but also the gold tip to it as well is made of a rubber. I imagine this (using rubber) being the brain-child of some consortium of employees who get paid a lot of money to come up with ways to worry management that children could fall on the castle and impale themselves ...
I guess only time will tell how well these turret tops age and if they become brittle and break with age.
One other thing to note is the fact the box-art shows the gold of the turrets and the pink/fuchsia to be shiny. Obviously this is a photo of a pre-production model - and not one using the rubber, which is not shiny at all. Either that, or they photo-shopped it, but my guess would be of a pre-production model using ABS plastic which was later changed.
The actual pieces are not that bad in appearance but enough of a difference that it is noticeable.
All-in-all this is a very good set and definitely increases the play-value of the 4250. I only wish they had add-ons like this with lots of accessories for the castles themed for boys.