Hi @Youi . Are the 2 numbers the download speed got from a speedtest?
Or, are they the wifi connection speed between wifi device and the router?
If you move the wifi device closer to the router, does the speed improve?
The vx220 wifi might be weaker than your previous router. Do you still have it?
Did you test the speed on the 2.4GHz band or the 5GHz band?
How about the speed test via Wired for comparison?
What NBN technology you have? Is it FTTN/B, HFC or FTTP?
You may try to improve your home WiFi network using these articles.:
Let us know how it goes.