difference in meaning between "to V" and "Ving"

[sitifan]

"Nice to meet you" is used for introductions, expressing pleasure at meeting someone for the first time, while "Nice meeting you" (or "It was nice meeting you") is used at the end of the conversation as a farewell.
Is there any difference in meaning between It's been nice knowing you and It's been nice to know you?

 

[Alex Case]

If the tense is the same, the meaning is the same.

We can say "It is nice to meet you" at the beginning and "It was nice to meet you" at the end, but only the former is abbreviated to "Nice to meet you".

We can also say "It was nice meeting you" at the end, but not "It is nice meeting you" at the beginning, so understandably "Nice meeting you" is only used as an abbreviation of the former.

The two "It's been" ones are the same tense hence the same meaning, though they are both rare, most commonly used when killing someone in gangster movies!