Hi CSharpino
Thank you for contacting Syncfusion Support.
Query: What are the differences between SfChromelessWindow and ChromelessWindow?
SfChromelessWindow has been implemented in order to reduce the Assembly Size. Please refer the following details:
To use the ChromelessWindow control, the Syncfusion.Shared.WPF assembly need to be referred in an application, Whereas its size is 13,341 KB.
Whereas to use the SfChromelessWindow, the Syncfusion.SfChromelessWindow.WPF assembly need to refer in an application which size 19kb is more likely to be less when compared to Shared assembly.

But both controls have the same feature. The one difference of the feature between the chromelesswindow and SfChromelessWindow is:
S.NO |
ChromelessWindow |
SfChromelessWindow |
1. |
ChromelessWindow supports the SkinStorage to apply the different themes. |
SfChromelessWindows does not support the SkinStorage to apply the themes. |
Regards,
Vijayalakshmi V.R.