What are the main differences between the paid and free versions?

I have a lot of issues/features that don’t work or worked better on the regular Wix version. so is there a list of abilities that are available only on the paid version?

ex. for something that works on “regular” Wix and not on editor x - Instagram feed. tried multiple times to download the widget and saw comment of others that it’s broken.

ex. for something that works only on the paid version - additional fonts that I saved to the website library. when it’s a free version others see some default font instead.