Wedding Website - Zola or The Knot

So I’m sure anyone can agree, the amount of wedding resources is overwhelming !
I’m torn between using Zola or The Knot for my wedding website. Whichever one I choose , I will be using for RSVPs/ importing a guest list, as well as a registry.

Can you ladies please share your experience with both/ which you would recommend ?

some key points;

-I already have a pretty extensive guest list on excel that I would be importing. I am not looking to manually enter guests into the website.

- I would prefer a website where I can create a registry with multiple stores/websites and add them to the wedding website (the knot seems to have this feature, and as far as I can tell, Zola seems to only allow you to add items you can order from their website - please correct me if I’m wrong on this)

- Finally - RSVPs; I have decided to do them completely only online , so I will need the website to be completely reliable in this area. Is the RSVP option on both sites customizable? For example , adding names for plus ones?

thanks for your help!