Contrary to Telerik.WinControls.UI.Barcode.QRCode, Telerik.WinControls.UI.Barcode.Symbology.QRCode creates invalid (unscannable) QR-Codes if the message contains umlauts when using ECIMode.UTF8.
We are using Symbology.QRCode, because we use it in columns of a RadGridView.
I've attached two example QR-Codes of the value "Bär", one using Barcode.QRCode, and the other one using Barcode.Symbology.QRCode.
Note: I have one scanner that can scan some of the Barcode.Symbology QR-Codes with umlauts.