The colors do not represent features but rather carriers, just as EVERY other BlackBerry has been as such. The Gold will likely be the Rogers release, or some other carrier's limited edition version (or some crap like that). The darker grey (Titanium, I believe they call it) will be the 8320 on T-Mobile. There are NO Curve devices that will feature GPS and Wi-Fi. The 8310 will be GPS-enabled. The 8320 will be Wi-Fi enabled. The 8330 will be GPS-enabled (standard CDMA device feature, so it will be crippled on VZW's release, as usual).