[karlb]

So am I right in understanding that… (i) When my new MacBook Pro arrives, I need to learn which is the Thunderbolt port. (ii) I can simplify matters by always buying the top-spec leads. If so, how do I know which to buy?

[taejavu]

Answer for (i): They're all Thunderbolt.

[kccqzy]

But some might be slower than others. https://support.apple.com/en-us/HT207256