Satoshis but Bitcoin.
ie There are 100 million satoshis in a Bitcoin. He has 7 Bitcoin.
Discussion
Who has 7 bitcoin? Baller!
Alice sends Bob 1 million satoshi.
Bob sends carol 1 million satoshis
This is repeated over again in the BOLTs, and in “Mastering the Lightning Network”
My guess is that people who see Satoshi as 1 person use satoshi and people who see Satoshi as many ppl use satoshis.