Sleipnir vs Opera : Which is Better?

Sleipnir

Sleipnir 3 is the Web browser created for users to make use of both their Windows / Mac desktop and smartphone device. Developed by Fenrir Inc.

License: Free

Apps available for Mac OS X Windows Android iPhone Windows Phone

Opera is a one of the major web browsers with good extension functionalities. Developed by Opera Software

License: Free

Apps available for Mac OS X Windows Linux Windows Mobile Android

Feature	Sleipnir	Opera
Built-in RSS reader
Dropbox integration
Facebook integration
Tabbed browsing
Tabbed interface
Twitter integration
Built-in Ad-blocker
Privacy focused
Support for TOR
Security & Privacy
Customizable
Cloud sync
Extensible by Plugins/Extensions
Android Sync
Built-in Adobe Flash Player
Tab Stacking
UI customization
Group tabs
Built-in VPN
Bookmarks
Extensions
Based on Blink engine
Chrome-like
Web Browsers Based on Chromium
Support for 64 bit
Privacy enhanced
Web Browsers Based on Firefox
Lightweight
Customizability
Developer Tools
Portable
Web Development
Firefox Extensions
Auto Updates
Block trackers
Bookmark organization
Built-in Download Manager
Based on Chromium
Multiple languages
Resume interrupted downloads
Block ads
Auto-login
Built-In Proxy
Explorer-like
Flexible customizations
Support for gestures
Limit cpu usage
Limit ram usage
Mouse gestures
Night mode/Dark Theme
Opera-like
Pop out video
Privacy Protected
Real-Time Synchronization
Session management
Sidebar
Spatial navigation
Support for Chrome extensions
Sync between devices
Tab preview
Text Wrapping
WebRTC
Whatsapp integration
Integrated into iOS
Content blocker
Sync with iCloud