Compare two JSON files and select all entries with a changed attribute

I have two JSON files with peers statistics:

File1.json:

{
  "transferIN": 111111,
  "transferOUT": 111234,
  "IPs": [
    "10.1.1.1/32"
  ]
}
{
  "transferIN": 111222,
  "transferOUT": 222234,
  "IPs": [
    "10.1.1.2/32"
  ]
}
{
  "transferIN": 111333,
  "transferOUT": 333556,
  "IPs": [
    "10.1.1.3/32"
  ]
}
{
  "transferIN": 111444,
  "transferOUT": 444875,
  "IPs": [
    "10.1.1.4/32"
  ]
}

File2.json:

{
  "transferIN": 111111,
  "transferOUT": 111234,
  "IPs": [
    "10.1.1.1/32"
  ]
}
{
  "transferIN": 111345,
  "transferOUT": 222233,
  "IPs": [
    "10.1.1.2/32"
  ]
}
{
  "transferIN": 111333,
  "transferOUT": 333990,
  "IPs": [
    "10.1.1.3/32"
  ]
}
{
  "transferIN": 111446,
  "transferOUT": 4448456,
  "IPs": [
    "10.1.1.4/32"
  ]
}

I want to compare them and get a list of IPs only which has a changed "transferIN" key.

So output should be like this:
10.1.1.2/32
10.1.1.4/32

I will use this in the bash script. So I started to look into jq.

What I did:

jq -n --slurpfile file1 File1.json --slurpfile file2 File2.json '$file2 - $file1' | jq .[] | jq -r .IPs[]

But this only show peers that have any changed stats (transferOUT can change also)

10.1.1.2/32
10.1.1.3/32
10.1.1.4/32

Also looked to INDEX and map_values but with no result.

Assuming you want to compare items of matching positions within their respective streams, you could slurp just one file, and successively read in the other file's items as a stream using input while iterating over the slurped ones using $file1[]:

<File2.json jq --slurpfile file1 File1.json -rn \
  '$file1[] | select(.transferIN != input.transferIN).IPs[]'

10.1.1.2/32
10.1.1.4/32