Different Hashrate on proxy and pool

[Muratthi]

Hello,

I have 12 miners with high-end cpus mining.

Proxy:
The proxy currently has 12 miners connected at 9496 h/s with an average diff of 11830

Pool: 7600 h/s

Why could be the difference of the hashrate between them ?
My proxy config file is like:

{
"pools": [
{
"hostname": "pool.supportxmr.com",
"port": 5555,
"ssl": false,
"allowSelfSignedSSL": true,
"share": 100,
"username":
"password": "proxy:",
"keepAlive": true,
"coin": "xmr",
"default":true
}
],
"listeningPorts": [
{
"port": 80,
"ssl": false,
"diff": 5000,
"coin": "xmr"
},
{
"port":443,
"ssl": true,
"diff": 10000,
"coin": "xmr"
}
],
"bindAddress": "0.0.0.0",
"developerShare": 0,
"daemonAddress": "127.0.0.1:18081",
"coinSettings": {
"xmr":{
"minDiff": 100,
"maxDiff": 300000,
"shareTargetTime": 15
}
}
}

Thank you very much.

[Muratthi]

For example right now
Proxy: The proxy currently has 13 miners connected at 9819 h/s with an average diff of 10918

Pool: 6800 h/s

[scanned]

is this the answer to a problem of "one computer connected to the internet and the rest cannot?"