Thanks guys,
I think both of them came DCC fitted, though I think I remember one of them being a nightmare to fit the chip.
Therefore I think one has a LokSound anyway, but they both sound the same. They are both fairly new.
When I did the CV8, 8 reprogramme as suggest by Irishthump, the only thing i noticed I think was a change was that with each speed increment, that the sound of the Engine changed 1 tone to another - - though neither ever moved.
And to answer murphaph, both run on a DC track without removing the chip.
thanks
t