Internet Speedtest

We have 700Mbps incoming internet.
When using XV2-2 I can goes up to 700Mbps, but when using XE3-4 the speedtest only goes up to 500Mbps

The network is as below;
ISP modem/router —> EX2052P ------ XV2-2/XE3-4

Which mean the same switch is connected to both AP model.

Anyone is experiencing this as well? Both are using 6.6.2.r4 firmware