Why is my upload speed on the PS4 Pro so slow compared to the download?

Good afternoon / evening. Today I bought the PS4 Pro from a colleague because I wanted a second PS4 (desk & sofa). I'm aware that the Playstation 4 does not allow as much internet as the Playstation 4 Pro, which suits me for ESL.

With the Playstation 4 (first generation) I had a download of 20 Mbit / s and an upload of 26 Mbit / s

POSSIBLE INTERNET: 200Mbit / s download and 40Mbit / s upload

With the Pro, the download is many times better, but since I upload some clips to YouTube, the old upload would be better.

Does anyone KNOW why this is so? Need help please.

Did you connect a LAN cable to the Pro and use WLAN with the Ps4? Because it doesn't make any sense otherwise. I've never heard that the Pro should have the internet better than the normal Ps4 and I can't find anything about it on the internet. The only thing that would throttle the internet would be the PSN servers. 150 Mbits is relatively normal on the Ps4. I don't know why your upload is so low either.

The first generation PS4 has less maximum WLAN without a LAN cable than for example. The second generation (or 3), we had already tried that and that is due to the hardware. The PRO is also better than the normal Playstation 4, which is also clear because of the number of hearts. (You can also see the number of hearts in the online router setting -> also with cell phones and IPads, etc. With the newer generation (PS5) you can use more of the fiber optic Internet connection without LAN than with the Pro

And it is not possible to connect a LAN cable as this is connected to the telephone connection.

I just tried it again on the normal PS4 (2m away) and there download is much worse than with the Pro, but better upload. I do not understand that entirely:/