Compare a CMS by who edits, how often, and what they must be able to change. WordPress fits marketing sites a team will keep publishing. A custom or headless setup fits when the product is really an application. Webflow fits when a visual editor is the publishing model you want. Shopify fits a store.
Do not choose from a feature grid alone. Sit with the person who will change a headline next month and see whether the tool matches them.
The wrong CMS is the one only the agency can open.