To answer your question, yes you'll receive Denim when Rogers releases it regardless of your current carrier SIM in the phone. Secondly Denim for older devices such as yours is basically 8.1.1 OS update coupled with the existing Cyan firmware that your phone already has. Now Rogers can take sometime to release it. If you want to wait or not your choice. If you want it now download Preview for Developers and get enrolled as a developer (it's free, read around) to get the OS update right away