Mmm not sure to be honest, as I personally haven't heard the same exhaust with and without hi flow cats, let alone the DC. From what the other guys say, the Pop charger will change the sound of air intake to a much more aggressive snarl, but don't think that will change the exhaust anymore, you will just get a combined sound.
That said, I would have thought that the sound of the raspy DC and the snarl of a pop charger might make acceleration sound a whole lot different!
I'll try and get you the sound clip soon. Will have to be later as working from home today, and can't really sit on my drive reving the tits off the car ...... (and would need it to be warm anyway!)