The newer ones are much lighter than the original champagne. The first champagne rigs PT did were (IMHO) way too dark. My DW wanted one and I did not. We compromised and went with the champagne cap. Which of course now is dis-coloring!
I REALLY like the new color they went with, it definitely is not white, sort of an off white cream color.
If I could I'd definitely opt for the new color, largely because it'll help hide the streaks and dirt a little better. Since our rig is in a storage yard cleaning it is a total PITA and big expense (cannot even bring it home, no access). Anything to reduce the need to clean it appeals to me. Also the new color is not dark enough to cause any heat issues.
2015 F-350 SRW 6.7 PSD
2014 Crusader 295RST
1 Fantastic DW
1 Amazing DD
1 Beagle that will be missed (RIP Zeus)