A:
Actually, yes, there are many differences between the Note 2 and the Tab 2 10.1. The Note 2 is a cell phone that has a 5.5" screen, support for the S-Pen and cell phone specific apps. The Note 2 also requires a cell phone plan with data.
On the other hand the Tab 2 10.1 is a Tablet, offers a 10.1" screen, does not have any cellular connectivity, will not support the S-Pen (but will support a standard capacitive stylus) and will support Tablet specific apps. Coincidentally, since this Tab 2 is not a cellular connected device and only offers WiFi, you will not need a monthly plan to use it.
-MrSamsung