As far as audiophilia is concerned I am an iconoclast on this subject as after years of experimentation and many thousands of pounds of expenditure I have concluded that the power cable supplied with the product is musically normally the best even if aftermarket cables can produce an initially more exciting sound. However a change is not always a real improvement.
So yes, aftermarket cables usually do make a sonic difference from the previous cable. I would also venture that it may impress you. However before spending the money I would suggest leaving the aftermarket cable in situ for a few days until the novelty has worn off. Then put back the original cable and let it play for an hour before making any judgement. Try not to listen for hi-fi artefacts but how the music connects with you. BTW, this may be difficult to arrange with your dealer as he may expect you to just pay the money and wave goodbye ( often the case with what are regarded as accessories) or, if you do manage to get a loan, it will be for too short a period to carry out this type of audition. Likewise a dem at a dealer will not tell you a great deal IMO.
If you read the technical justifications for such cables there is an implication that dCS ( or any other high end manufacturer) does not know how to design a decent power supply and that spending on an expensive cable will somehow improve on it. Hmmmm…
I’ll bet that nobody agrees with me