What is the difference between Opera Mini and Opera mobile?

From my experience: Opera Mini is faster, opera mobile is slow. However if you are too conscious about security use mobile instead.

Size: Opera Mobile is ~20MB, Opera Mini is barely 900KB. Rendering: Opera Mobile downloads HTML from web server and renders the website on your phone, Opera Mini downloads an optimized version (in Opera's Binary Markup Language/OBML) of the website from Opera's proxy. Opera Mobile is more resource hungry, on Opera Mini many of the rendering task is done on the proxy server, which cuts the amount of processing, bandwidth, and memory requirement Data Usage: Opera Mini downloads a OBML (Opera Binary Markup Language) from Opera's server, which compresses pages by up to 90% (according to Opera). Opera Mobile downloads the whole webpage from the original site, which can amount to quite a bit of bandwidth (note that Opera Mobile can also use Opera Turbo, which can also reduce bandwidth usage). Last I checked, zooming in and out and rotating the screen in Opera Mini wouldn't reflow the text. Opera Mobile has full Javascript support, Opera Mini only supports a http://dev.opera.com/articles/view/javascript-support-in-opera-mini-4/ subset of Javascript In short, Opera Mini is much faster and much leaner, which is especially noticeable on less powerful devices and on slow networks; however Opera Mini is not a full-featured browser (and is never meant to be). Opera Mini is much faster on slower network and slower phones. Opera Mobile is a full-featured browser. It has full Javascript, it connects to websites directly instead of going through Opera's server, and it is usable to access intranet websites that Opera's proxy server cannot access.

If you are running net on 2g SIM then I recommend you Opera mini. But if you are running net on 3g or WiFi, then Opera mobile would be the best option.

i use nokia 5320 and i used opera mobile and mini opera mini is faster than opera mobile and low power consuption and less data usage opera mobile use more than battery and more than data usage opera mini is better than uc and other browsers so i suggest every one use opera mini when you have a limite data plan when you have unlimited data plan you used opra mobile .