Is there any difference between using a non-Apple sync cable compared to an Apple one for your iDevice(s)?
Q: Would you patronize a streetwalker?
A: No, I would treat her as an equal.
I have several aftermarket cords and the only issue I ever had was it not fitting some cases on the iPhone.
The iPhone 3GS is picky about what cable can be used to charge the phone but is more tolerant for synchronization.
Earl F. Parrish