SLOW/DIFFERENT BANDWIDTH FROM MIKROTIK AND WINDOWS PC

Hello Freinds,
I am faced with this issue. I have a 4meg up/down fibre connection from my ISP, but when I run speedtest or bndwidth test from differnt sites, I get different and lesser bandwidth if I connect thru mikrotik but higher banwidth if I connect thru my laptop.

I am using RB 2011Uias as the router. Below are the snapshots of bandwidth test when connected thru mikrotik and laptop.

your help is needed please.

4mbits are not about the device used but about the config. Maybe cables or wifi connection is bad…