You can definitely make them sound different using the different sound field settings, tone controls, etc, of which there are an infinite number of adjustments that can be made to the receiver output to the speakers. All of which have an impact on the sound output. IMO, you should look for the features on the receiver that you like, read the reviews so that you know you're getting a good value, and choose based on features and value. Trying to differentiate the sound of the receiver between the ones you mentioned, although many may claim they can, is IMHO, a waste of time.