No, you pay more to get an e-commerce store, but trade-off for lesser CMS items than website hosting.
Standard is similar to CMS hosting, but with a lower limit of 500 items instead of 2k items.
Plus/Advanced is similar to Business hosting, but with lower limit of 1k or 3k items respectively, instead of 10k items.
See fine print on new pricing page here https://webflow.com/pricing
Not to mention the prices are for beta sites only. In future e-commerce store hosting will increase when more features are released. You cannot switch back to normal website hosting from e-commerce hosting easily (you will have to delete all your e-commerce bindings, collections, pages, before you can downgrade back to CMS/basic hosting).