Kanchipuram/Kanjivaram silk sarees have a smooth glossy finish, so when rubbing your hands on the saree it should feel soft and a difference in the temperature of your palm. If you feel a rough texture or patch and no variance in temperature then it is not authentic.

The Kanchipuram silk sari is a type of silk sari made in the Kanchipuram region in Tamil Nadu, India.

Both refer to the same type of saree. "Kanjivaram" is a common mispronunciation of "Kanchipuram," which is the correct name. So, there is no actual difference between the two; they both denote the luxurious silk sarees handwoven in Kanchipuram, Tamil Nadu.