Hello and welcome aboard.
Actually Google and Wikipedia is more handy regarding these questions. You can find the difference here: http://en.wikipedia.org/wiki/Android_version_history
here's a link to our Device/Carrier Comparisons - Android Forums
. Hopefully this place will be of help to you.
I'd like to know the difference between jelly bean and ice cream sandwich. And also which tablet to go for, samsung tab2 10.1 or note.
You can find videos and reviews on both of these devices on YouTube. However, I would suggest the Note 2.
You should use the full site of the forum on your phone... that is what I use.
Currently I am on my phone so I can't provide a link, but it is within the Android Lounge forum.