Seeking Help Jio AirFiber Max 300 Mbps connection: 20 dBi Antenna - Ping with 20 dBi vs. 25 dBi Antenna

[songoku]

I got airfibermax 300 mbps connection. For that they gave a 20 dbi antenna for c6 device. 25 dbi is not in stock.

Tower is 600 metres away. Will I get less ping if I get 25 dBi antenna? Currently getting 11-12ms in Ookla speedtest(Idle).