keep me up to date vs. keep me in the loop?

English as a Second Language English Vocabulary, Grammar and Idioms
1

So what is the difference between these two expressions:
to keep someone up to date
to keep someone in the loop

Thanks,
Torsten[YSaerTTEW443543]

TOEIC listening, talks: Radio commercial for an invisible dog fencing system[YSaerTTEW443543]

2

There is no difference, except that “keep someone in the loop” is office slang.