Difference between MT5 and MT5 broker version.

 

Is there any difference in the MT5 version downloaded directly from MQL5 and the versions provided by brokers besides the branding from their part?

Today I've found out that I had different pings to the server when using their client insted of the "original MT5 from mql5". The difference running on the same computer is 10.5ms vs 4ms to the servers, so I'm wondering what changes they made to the client? And if there is any difference in performance between the clients.