The major difference between E-commerce and Normal SEO package lies in their end goals. While the purpose of normal SEO is to increase optimization and visibility in the Search Engine Result Page, in Ecommerce the purpose is to ensure significant rank for your product/category pages for relevant items. People often take eCommerce and local SEO as one, but the reality says otherwise.
In local SEO the target is to gain higher ranks in the local searches for relevant businesses. It focuses on business page creation, entries in the right directories, correct NAP (name, address, phone/contact/email) details, and reviews and ratings. But in eCommerce SEO the focus is more on the keywords in titles/headings and content description, Internal Link Text, Image Alt attributes, etc.