Nextcloud Pi, Talk, migrate from Raspberry Pi 4B, rev 1.1, 4GB to 8GB RAM?

Comrades,

I run Nextcloud Pi on a Raspberry Pi 4B, rev 1,1 with 4 GB RAM, I run the entire installation, including OS from an SSD, there’s no SD-card present.

Now, I wonder whether Nextcloud Pi, and Talk would run better if I switched to the 8 GB RAM version of the Pi.

And if it would make an appreciable difference, would I be able to just plug my SSD into the new Pi?

Humbly, Ylan