Hello!
Me and my peers are doing a small research about the difference between the original Arduino and the clone as a project for college. Could you please take the time to answer these questions? It only takes less than five minutes.
Thank you in advance! 
Second question - Do you use the original Arduino or the clone?
Seems like a huge Bias on your part assuming most users even know the difference.
OK, I answered.
Do note that many supposed "clones" are misleadingly advertised as "UNOs" when they are in fact, nothing like a UNO but rather a variant of the earlier - and perfectly functional - Duemilanove.
The UNO is distinguished by the presence of the 16U2 (or earlier) secondary microprocessor programmed as a USB to serial "bridge". Without this, it is mendaciously misleading to refer to the device as a "UNO" as it lacks UNO functionality which includes the option to program the 16U2 for additional functions such as a HID.
Of course, many fakes (as distinct from actual clones) use the CH340 instead of the undesirable FT232 which requires a different driver but is otherwise a perfectly functional replacement.
Probably get more responses if you took the time to make your link clickable.