I’ve been an avid Squarespace user for the past 10 years but if I was building sites for clients, I’d probably mess with Editor X.
Try Wix Editor X here: https://sqspthemes.com/wix
Try Squarespace here: https://sqspthemes.com/squarespace
Fluid Engine Overview: https://sqspthemes.com/blog/squarespace-fluid-engine
Squarespace vs. Wix: https://www.sqspthemes.com/blog/squarespace-vs-wix-how-do-they-compare