Thunderbolt 2 vs. Thunderbolt 3 cables?

[kat.hayes]

How can you tell the difference between Thunderbolt 2 and Thunderbolt 3 cables?

Thanks.

 

[chrfr]

How can you tell the difference between Thunderbolt 2 and Thunderbolt 3 cables?

Thanks.

The connectors are completely different. Google led me to this thread that has a good photo: https://forums.macrumors.com/threads/thunderbolt-2-to-thunderbolt-3-adapter.2009032/
The black cable is Thunderbolt 3.

 

[CWallace]

How can you tell the difference between Thunderbolt 2 and Thunderbolt 3 cables?

Thunderbolt 2 uses a mini-DisplayPort physical connector whereas Thunderbolt 3 uses a USB-C physical connector.