Hello. I believe it was a bit of a running joke, but in actuality, the amp chassis and specs are all the same between the different color options for the same model. On an oddly ironic note though, my black K200-B6 head has more punch than my blue sparkle K200-A5 PA head... but those are different models, and the A-5 has a reverb which cuts some gain. In conclusion, if the two amps are the same model and both are in the same condition and have seen the same ammount of use throughout their lives, their color shouldn't affect their performance when comparing them. And no, swapping out encolsures for one of a different color won't give you more power haha. Good luck!