Magento 1 Magento 2
No Front-end Library Ships with LESS
No Support for HTML5/CSS3 Native Support HTML5/CSS3
Weak Content Staging Advanced Content Staging
External PayPal In-Site PayPal Experience
Full Page Cache (EE) FPC (EE)/Varnish
Severe DB Locking Issues Zero Table Locking (Checkout)
Decent Automated Tests Better Automated Tests
JS – Prototype JS – Jquery
No Data Grid Customizable Data Grid for Catalog
Admin Non-Responsive Responsive Admin Panel
EE Pricing by License EE Pricing by Order Volume