Sorry, Chris, I didn't post on this yesterday.
The SF DevExpress TextEdit should certainly be inheriting from the same control, but there's a possibility you might need to change the references in the SF inherited DevExpress project and rebuild it. I you have more than one version of DevExpress installed, it's possible that you could be referencing a different version in your project than the SF one is referencing.
Are the properties there in code?
To make sure that the SF one is inheriting the proper version, you can drop one of each on your form, run it, and then at a breakpoint, check the following in the watch window:
1) this.sfControl.GetType().BaseType.AssemblyQualifiedName
2) this.dxControl.GetType().AssemblyQualifiedName
These should be the same values, version and all.