Magento Development Differences

What are the main differences between
Magento 1 and Magento 2?

1.02.0
API has been illegitimately addedAPI is at the heart of the technology, which has a new architecture for speed and is open source (CE)
Architecture that is flexible and adaptiveContains LESS
Free and Open Source Software (CE)Hosted Fields for PCI Compliance 
There isn’t a front-end library–
PHP is a prestige languagePHP 5.6+ and PHP 7.0 
HTML5/CSS3 is not supportedHTML5/CSS3 native support
RWD Theme Theme for RWD is included
Content Staging Is InsufficientPDP (Integrated Video)*
Searching at a Low Level (SOLR)Search Elasticity (EE)
PayPal is a third-party service PayPal Experience on-Site
Bridge securedVarnish/FPC (EE)
Video with a minimum of featuresZero Locking Tables (Checkout)
Cache for the entire page (EE)Enhanced Automated Testing
DB Locking Issues are Severe A new “Marketplace” has been created.
Good automated tests2.0 Extensions with the Smallest Numbers
JS – Prototype JS – Jquery
A large extension marketplace is availableCatalog Data Grid with Customizability
Admin Panel Is Out Of Date (Backoffice)Admin Panel Which Is Responsive
There is no Data Grid–
Admin is not respondingAdmin has a brand new look.
EE Pricing is based on the number of licenses you haveEE Order Volume Pricing
Project Cycle: 5-12 Months Project Cycle: 4 to 8 Months*
Checkout with an antiquityCheckout Process Simplified
Payment and shipping options that are popularPayment and shipping methods are equal.
Extension Market for the “Wild West”Extended Extension Testing
Connect with the Connect StoreStaging of Advanced Content