v11.3 is using SSL for devfees. So if you are running a nodevfee you won't be getting those hashes. Claymore will. He's upped his game to get more shares from you! Just masking it will higher hashrates for his newer version.
Claymore did on v11.2, by the way phoenix miner has a lower devfee 0.65% and the tests i did showed phonexminer is legit on the devfee.