Opera Mini and Opera Mobile are two versions of Opera browsers for Android and other mobile platforms.
There are few differences between them discussed as follows:
Opera Mini is faster as compared to opera mobile browser. Opera Mobile downloads HTML from web server and renders the website on mobile phone, while Opera Mini downloads an optimized version (in Opera's Binary Markup Language/OBML) of the website from Opera's proxy server which compresses web pages by up to 90%. Opera Mobile downloads the complete webpage from the original site, which can increase amount of bandwidth.
File size of Opera Mobile is more than 10MB, while Opera Mini has size of few MBs. So, it opera mobile consumes more space for store installation files and data.
Opera Mobile is a complete browser performing all processing activities on Android device. So, it puts more load on Android as compared to opera mini.
Opera Mobile is recommended for 3G or Wifi connections, and opera mini can work seamlessly even on 2G network connection.